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Emerson 848L Satellite Radio User Manual

1. 24V RTN FIELDBUS 24VDC OUTPUT DEVICE H W 2 gt W a E gt a E gt o OUTPUT DEVICE E LU 2 gt LI a e 2 a E 2 o 9 32 VDC Outputs 2 7 848 8481 848L 10 AA 848L 11 AA 848L 12 AA 848L 13 AA 848L 14 AA EPS Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 TAGGING Figure 2 6 Commissioning Tag 2 8 Commissioning Tag The 848L is supplied with a removable commissioning tag that contains both the Device ID the unique code that identifies a particular device in the absence of a device tag and a space to record the device tag the operational identification for the device as defined by the Piping and Instrumentation Diagram P8ID When commissioning more than one device on a fieldbus segment it can be difficult to identify which device is at a particular location The removable tag provided with the transmitter can aid in this process by linking the Device ID to its physical location The installer should note the physical location of the transmitter on both the upper and lower location of the commissioning tag The bottom portion should be torn off for each device on the segment and used for commissioning the segment in the control system o COMMISSIONING TAG Device ID revcce ip 0011510848 FR TEMP 0x810AAC05 0X810AAC05 Device Tag s to denote 7 TeARHERE physical man na lo
2. C 9 Discrete Output Block C 11 Supported MOdES A foe stearate pelea ed ete date ede NAG on at C 11 Multiple Discrete Input Blocks C 12 Multiple Discrete Output Block C 13 TOC 2 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L APPENDIX D Error HANGING o a eerie anak iia pas eine Ka Gab NG D 4 Logic Equation Syntax ExampIesk de ad oid po prior Nh PAGG ba DADA D 5 APPENDIX E Introduction to Motor Control E 1 Motor Control Variations on Motor Control E 2 Writing 848L Eguations E 4 Basic Motor Control E 4 o Ki A sadi ak A E 5 Permissive a ani etre An tee aleve a at ka RA ate ata hahaha aerate E 5 Emergency Shutdown E 5 Restant Delay ii AA os A E 6 Maximum Restarts eee ene E 7 Winding Temperature a a ee ee Ta eee E 8 Hand OffFAUtO n aaa bite Sek a eed eres a a ANGKAN E 9 Intermediate Stop E 10 Redundant Motors Alternate Start E 11 Redundant Motors Timed Switch E 12 Redundant Motors Switch on Failure E 14 APPENDIX F Introduction
3. 0UT2 EQ 4 4 Rung P is equation 1 It generates the pulse that will toggle the latch The pulse comes from the RISE function The expression is AND NOT IN 3 NOT IN 4 RISE IN 2 Rung L is equation 2 It latches on when L was false and unlatches when L was true The expression is RS AND EQ 1 NOT EQ 2 AND EQ 1 EQ 2 Rung Out1 is output equation 1 This is basic motor control with additional contacts The expression is AND IN 1 OR IN 2 IN 3 NOT EQ 2 NOT OUT 2 Rung Out2 is output equation 2 This is also basic motor control with additional contacts e The expression is AND IN 1 OR IN 2 IN 4 EQ 2 NOT OUT 1 E 11 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Redundant Motors Timed Switch E 12 Again redundant pumps are used but only one pump runs at a time The process runs for years without being shut down The switch between pumps occurs at a time near the end of the useful life of the pump usually several thousand hours Stopping the old pump is delayed by a TOF while the other pump comes up to speed which the control valve can handle The push button controls are Stop input 1 and Start input 2 An auxiliary contact is required from each starter inputs 3 and 4 The life time is measured in thousands of hours so an external retentive timer with a display is used Timing power comes from Out2 reset power from Out1 and
4. If the device or sensors are installed in a high voltage environment and a fault condition or installation error occurs the sensor leads and transmitter terminals could carry lethal voltages Use extreme caution when making contact with the leads and terminals NOTE Do not apply high voltage e g AC line voltage to the transmitter bus or I O power terminals Abnormally high voltage can damage the unit bus and I O power terminals are rated to 42 4 VDC 6234 ft 1900 m max depending upon cable Integrated Power characteristics Conditioner a and Filter Terminators a aa PN Fa Trunk 8 Power AN Supply NG 5 2 o FOUNDATION fieldbus Host or configuration tool ff K lt o o m eb IT o c Q pan o x 848 848 OTA The transmitter reguires both a fieldbus connection and power for the discrete I O channels Fieldbus Connection The fieldbus connection requires between 9 and 32VDC to operate the electronics The dc power supply should provide power with less than 2 ripple A fieldbus segment requires a power conditioner to isolate the power supply filter and decouple the segment from other segments attached to the same power supply Signal wiring should be shielded twisted pair for best results in electrically noisy environments Do not use unshielded signal wiring in open trays with power wiring or near heavy electrical equipment Use ordinary copper wir
5. The following procedure is used to set the latching state of each input equation or output 1 Set MODE BLK TARGET to OOS 2 Select the appropriate parameter for either inputs eguations or outputs a Inputs use parameter MACRO IN LATCH b Outputs use parameter MACRO OUT LATCH c Eguations use parameter MACRO EO LATCH For each input output or equation select either Latch Positive Pulses or Latch Negative Pulses or disabled Logic Equations The 848L provides for 16 Logic Equations and 4 Output Equations The Output Equations drive the hardware outputs Each logic equation consists of up to 80 characters with a semicolon as the last character The equations are evaluated at a nominal rate of 100msec However this will vary based on the number and complexity of the equations used The logic block consists of variables that are connected to the hardware I O obtain values or send values over the bus and internally calculated variables as shown in Figure 3 1 The value or state of the logic block variables can be communicated on the bus by assigning the appropriate channel number of a DI or MDI block The DO variables can be set externally by assigning the appropriate channel number in a DO or MDO function block The DO function blocks do not drive the outputs directly The DO function block can drive the output by referencing the appropriate DO variable in the output equations Reference Manual 00809 0100 4696 Rev AA Septe
6. 3 2 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Link Active Scheduler Block Instantiation The Rosemount 848L can be designated to act as the backup Link Active Scheduler LAS in the event that the LAS is disconnected from the segment As the backup LAS the Rosemount 848L will take over the management of communications until the host is restored The host system may provide a configuration tool specifically designed to designate a particular device as a backup LAS Otherwise this can be configured manually as follows 1 Access the Management Information Base MIB for the Rosemount 848L 2 To activate the LAS capability write 0x02 to the BOOT OPERAT FUNCTIONAL CLASS object Index 605 To deactivate write 0x01 3 Restart the processor Rosemount devices are pre configured with function blocks at the factory the default permanent configuration for the Rosemount 848L is listed below The Rosemount 848L can have one additional instantiated function block 8 Discrete Input Blocks 4 Discrete Output Blocks e Multiple Discrete Input Block e Multiple Discrete Output Block The Rosemount 848L supports the use of Function Block Instantiation When a device supports block instantiation the number of blocks and block types can be defined to match specific application needs The number of blocks that can be instantiated is only limited by the amount of memory within the device and the blo
7. The expression is TOF OR IN 5 IN 6 300 Rung Out1 is output equation 1 This is basic motor control with additional contacts The expression is AND IN 1 IN 3 OR AND IN 4 NOT EQ 1 IN 5 NOT OUT 2 Rung Out2 is output equation 2 This is also basic motor control with additional contacts The expression is AND IN 2 IN 3 OR AND IN 4 NOT EQ 1 IN 6 NOT OUT 1 If a brake was required it could be controlled by output equation 3 The expression is AND EQ 1 NOT IN 5 NOT IN 6 This simulation requires two relays in addition to the switches Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Redundant Motors Alternate Start Two motors drive two pumps in a redundant configuration The control valve that follows the pumps will just waste the energy of the second pump possibly damaging the valve if both pumps on at the same time There are times when neither pump is required When a pump is required the pump that was not in use last time should be started to equalize the wear on the pumps The push button controls are Stop input 1 and Start input 2 An auxiliary contact is required from each starter inputs 3 and 4 3 4 2 P ke 5 gt a Cadang aa 4 EOL P L L ase less strane Set EQ2 P L ii Reset 1 2 L Out2 Outl Ss OUT1_EQ 3 4 il 2 L Outl Out2 ESOO PERA E3
8. The fourth similar spring return valve in the same 848L EQ4 contains TON OR AND NOT DO 4 NOT IN 8 AND DO 4 IN 8 100 OUT4 contains DO 4 A bistable valve with both confirms and a local station EQ1 contains OR AND NOT IN 4 DO 1 IN 3 EQ2 contains TON OR AND NOT DO 1 NOT IN 2 AND DO 1 NOT IN 1 AND IN 1 IN 2 120 OUT1 contains TP DO 1 30 OUT2 contains TP NOT DO 1 30 The second similar bistable valve in the same 848L EQ3 contains OR AND NOT IN 8 DO 2 IN 7 EQ4 contains TON OR AND NOT DO 2 NOT IN 6 AND DO 2 NOT IN 5 AND IN 5 IN 6 120 OUT3 contains TP DO 2 30 OUT4 contains TP NOT DO 2 30 The permissive may be wired or internal or from the bus The example uses DO3 from the bus The confirmed open switch is used to hold the valve open if the permissive goes away If the valve is spring return OUT1 contains AND DO 1 OR DO 3 IN 1 A bistable valve does not need a latch OUT1 contains TP AND DO 1 DO 3 30 OUT2 contains TP NOT DO 1 30 Either way the alarm equation for just the open confirm is TON OR AND DO 1 NOT IN 1 AND NOT DO 1 IN 1 110 The alarm equation for both confirms is TON OR AND NOT DO 1 NOT IN 2 AND DO 1 NOT IN 1 AND IN 1 IN 2 120 F 5 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Double Block and Bleed F 6 Certain materials must not leak through
9. Warnings sa triton Sah Soke KANA eb tetas bai dias 3 1 General Block Information 3 2 Mode S cuicos vated da v a oY A a Stee 3 2 Link Active Scheduler 3 3 Block Instantiation 3 3 Capablliti ci sis do VE Ni ee el KG NENG Nga 3 4 Resource Block a 3 4 FEATURES and FEATURES SEL 3 4 MAX NOTIF oani ti eh EEA oi o toge Pe eat AM 3 5 PlantWeb Manis OE PO Adan ER TETO 3 6 Ad cit a sile be Sb O ee See Ne 3 9 VO Transducer Block ccoo aaa lej eae ev dane awa Sena ws 3 9 Logic Transducer Block 3 10 Discrete Input Blocks 3 20 Discrete Output Blocks 3 21 Multiple Discrete Input Block 3 21 Multiple Discrete Output Block 3 21 ROSEMOUNT EMERSON www rosemount com Process Management Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 SECTION 4 Safety Messages ad A ee ain ena eta Rea GS 4 1 Operation and Warmingsi 22 EN 4 1 Maintenance Foundation Fieldbus Information 4 1 Commissioning Addressing 4 2 Hardware Maintenance 4 2 Sensor Check es sitna ale Poa OE AE M
10. 0100 4696 Rev AA September 2004 Rosemount 848L Appendix E INTRODUCTION TO MOTOR CONTROL ROSEMOUNT Motor Control Introduction to Motor Control page E 1 Variations on Motor Control page E 2 Writing 848L Equations page E 4 Industrial motors require about a kilowatt per horsepower usually delivered as three phase AC at 440 volts or higher This requires a special switch to turn them on and off The switch is called a contactor in which a solenoid is energized to pull a set of three power contacts to close the circuit to turn the motor on The contacts are large enough to carry the starting current without welding They are separated by insulation suitable for the supply voltage The solenoid is de energized to turn the motor off Springs quickly separate the contacts to prevent arc damage which can be severe at higher voltages A contactor for a 400 HP 2500 VAC motor may be housed in a steel box that is two feet square and five feet high The three phase wires to the motor go through three overload heaters There are no contacts in this wiring just heaters that mount on screw terminals The same contactor may be used for different motor sizes by changing the heater overload rating When an overload occurs the heaters cause a contact to open that is in series with the contactor s solenoid which removes power from the motor This action is called
11. 2 AND DO 1 IN 2 AND NOT DO 1 IN 2 5 0 EQ2 contains OR TON OR AND NOT DO 1 NOT IN 2 AND DO 1 NOT IN 1 300 EQ 1 The media are steam and chilled water DO1 is on to select heating with steam and off to select cooling with water All four valves have both confirms as follows Valve Output Opened Closed Steam In Out1 In1 In5 Steam Out Out2 In2 In6 Water In Out3 In3 In7 Water Out Out4 In4 In8 Steam condensate must drain and both steam valves be closed before the water valves are opened The water must drain and both water valves be closed before the steam valves are opened There is a steam trap after the steam outlet valve to prevent steam from blowing through the heat exchanger The opening of the steam outlet valve is delayed to allow some condensate to form in the exchanger for proper operation of the trap OUT1 contains AND DO 1 IN 7 IN 8 OUT2 contains TOF TON OUT 1 1200 1800 OUT3 contains AND NOT DO 1 IN 5 IN 6 OUT4 contains TOF OUT 3 1600 Heating is confirmed if In1 and In2 and In7 and In8 are on Travel time must include the water drain delay time and the steam outlet opening delay Cooling is confirmed if In3 and In4 and In5 and In6 are on Travel time must include the steam drain delay time EQ1 contains TON AND NOT DO 1 NOT AND IN 3 IN 4 IN 5 IN 6 1900 EG2 contains OR TON AND DO 1 NOT AND IN 1 IN 2 IN 7 IN 8 2900 EQ 1 F 7 Rosemount 848L Re
12. 2 5 Cable Gland Installation 2 9 Capabilities 3 2 PE ER NO a AN V Commissioning Tag 2 8 Link Active Scheduler 3 2 Analogiinput Function Block Conduit Entries Installation 2 10 Modes 3 2 Parameters C 1 C 5 C 8 s Ka Gata AA ey TAN Dimensional A 5 Grounding 2 5 Approvals Analog Device 2 5 European B 2 G Os eee ee UE North American B 1 rounded Thermocouple s 29 Transmitter Enclosure 2 5 Approved Manufacturing Locations B 1 ROSEMOUNT Eon www rosemount com Process Management Reference Manual 00809 0100 4696 Rev AA Rosemount 848L 9 17 04 H Modes UNICODE 3 4 Hardware Changing Modes 3 2 WRITE LOCK 3 5 Maintenance 4 2 Permitted Modes 3 2 Parameters C 13 Communication Check 4 2 Types of Modes 3 2 Discrete Input C 10 Power Check 4 2 AA 3 2 Discrete Output C 12 Reset Configuration 4 2 Mania sana naaa ce ie 3 2 I O Transducer C 1 C 5 Sensor Check 4 2 Other os eds 3 2 Logic Transducer C 8 Out of Service 3 2 Multiple Discrete Input C 13 i Motor Control E 1 Multiple Discrete Output C 14 VOT d Mounting 2 1 Permitted Modes 3 2 E rans Ro Ba 2 Inch Pipe Sta
13. 24 EQ 8 Channel 2 Input 2 Channel 25 EQ 9 Channel 3 Input 3 Channel 26 EQ 10 Channel 4 Input 4 Channel 27 EQ 11 Channel 5 Input 5 Channel 28 EQ 12 Channel 6 Input 6 Channel 29 EQ 13 Channel 7 Input 7 Channel 30 EQ 14 Channel 8 Input 8 Channel 31 EQ 15 Channel 9 DO 1 Channel 32 EQ 16 Channel 10 DO 2 Channel 33 Output 1 Channel 11 DO 3 Channel 34 Output 2 Channel 12 DO 4 Channel 35 Output 3 Channel 13 DO 5 Channel 36 Output 4 Channel 14 DO 6 Channel 37 Packed Inputs Channel 15 DO 7 Channel 38 Packed DO Channel 16 DO 8 Channel 39 Packed EQ1 Channel 17 EQ 1 Channel 40 Packed EQ2 Channel 18 EQ 2 Channel 41 Packed Outputs Channel 19 EQ 3 Channel 42 Array Inputs MDI Only Channel 20 EQ 4 Channel 43 Array DO MDI Only Channel 21 EQ 5 Channel 44 Array EQ1 MDI Only Channel 22 EQ 6 Channel 45 Array EQ2 MDI Only Channel 23 EQ 7 Channel 46 Array Outputs MDI Only Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L DISCRETE OUTPUT BLOCKS MULTIPLE DISCRETE INPUT BLOCK MULTIPLE DISCRETE OUTPUT BLOCK Simulation Simulation replaces the channel value coming from the transducer block for testing
14. 6 Any state change on IN6 that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure 106 will have its value set to this value An identifier associated with discrete input 7 The value and status of discrete input 7 The number of pulses that have occurred on IN7 since last reset The transducer type of discrete sensor 7 Any state change on IN7 that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure 107 will have its value set to this value An identifier associated with discrete input 8 The value and status of discrete input 8 The number of pulses that have occurred on IN8 since last reset The transducer type of discrete sensor 8 Any state change on IN8 that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure 108 will have its value set to this value Identifies the transducer that follows One of the error codes defined in FF 903 XD_ ERROR and Block Alarm Subcodes A directory that specifies the number starting indices and DD item IDs of the data collections in each transducer within a transducer block For further information please refer FF 902 An identifier associated with discrete output 1 The value and status of discrete Output 1 The transducer type of discrete sensor 9 Any state change that lasts for a duration less than th
15. 9 32 VDC Outputs 848 848L 848L 10 AA 848L 11 AA 848L 12 AA 848L 13 AA 848L 14 AA EPS Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L ORDERING INFORMATION Model Product Description Includes One Fieldbus H1 Segment 848L Fieldbus Logic Transmitter Code Communications Protocol FOUNDATION fieldbus digital signal includes 8 DI 4 DO 1 MDI and 1 MDO function blocks and Backup Link Active Scheduler Code Power Input Bus and I O Power 4 wire Rosemount Junction Code Product Certifications Box reguired NA No Approval No N1 CENELEC ATEX Type n enclosure reguired Yes NC CENELEC ATEX Type n Component No ND CENELEC ATEX Dust Ignition Proof Yes N5 FM Non Incendive for Class 1 Division 2 Groups A B C D Yes N6 CSA Non Incendive for Class 1 Division 2 Groups A B C D Yes IECEx Type n Approval consult factory for availability enclosure required Code Discrete Inputs and Outputs Types 001 8 Dry Contact Inputs 4 9 to 32 VDC Outputs 002 8 2 wire NAMUR Sensor Inputs 4 9 to 32 VDC Outputs 003 8 3 wire NAMUR Sensor Inputs 4 9 to 32 VDC Outputs 004 8 9 to 32 VDC Inputs 4 9 to 32 VDC Outputs Code Options Transient Protection T1 Transient Protection Consult factory for availability Mounting Kit Options B6 Mounting Kit to a 2 in pipe Non Explosion Proof Junction Box Options JP1 Plastic Junction Box No Entries JP2 Plastic Junction Box Cable Gla
16. ACTIVE 3 7 u Senor aai ADVISE ENABLED 3 7 h MAINT ALM 3 7 E Connection Check 4 2 ADVISE PRI 3 7 MAINT ENABLED 3 7 Sensor DEFINE_WRITE_LOCK 3 5 MAINT MASK 3 7 my Tagram ci kets al 2 8 FAILED_ACTIVE 3 6 F 3 MAINT PRI 3 7 FAILED ALARMS 3 6 Simulate Enable Switch 2 6 MAINT_ALM 3 7 See yg Way a voja E Soft W Lock Hard WLock 3 5 FAILED ALM 3 6 KASERA MAINT ENABLED 3 7 Specifications FAILED ENABLED 3 6 a MAINT MASK 3 7 Function Block A 4 FAILED MASK 3 6 i MAINT PRI 3 7 Functional A 1 ean FAILED PRI 3 6 q Maintenance 5i Physical nociones caian A 4 FEATURES 3 4 Hardware 4 2 SUGES La pope an epoetina Wla 2 5 no goes FEATURES SEL 3 5 a Communication Check 4 2 oF Switches 2 5 LIM NOTIFY 3 5 i Power Check 4 2 mg Security 2 6 Reset Confi ti 4 2 MAINT_ACTIVE 3 7 Simulate Enabl 2 6 eset Configuration MAINT ALARMS 3 7 imulate Enable Sensor Check 4 2 Material Ret 1 3 MAINT_ALM 3 7 TONE SE a eae a MAINT ENABLED 3 7 MAX NOTIFY 3 5
17. DO function blocks This switch is used to simulate input status As a lock out feature the switch must transition from OFF to ON after power is applied to the transmitter This feature prevents the transmitter from being left in simulator mode NOT USED The switch labeled NOT USED is only used for product engineering and development purposes and should always remain in the OFF position If the switch is turned to the ON position and power is applied the 848L will not be present on the fieldbus segment Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L I O WIRING DISCRETE INPUT WIRING CONFIGURATION LE LE INS ING IN7 IN8 BUS PWR h IN5 ING IN7 IN8 BUS PWR VDOVSDODO VIDA Ez a E AIN Na FIELDBUS 24VDC 2 Wire NAMUR Sensors 1 of 2 Input Connectors FIELDBUS 24vDC Dry Contact Switches 1 of 2 Input Connectors IN5 IN6 IN7 IN8 BUS PWR IN5 IN6 IN7 IN8 IOS VdOVDODODO BUS PWR SODO tO is FIELDBUS 24VDC 24V RTN FIELDBUS 24VDC 24V RTN 3 Wire NAMUR Sensors 9 32 VDC Sensors 1 of 2 Input Connectors 1 of 2 Input Connectors DISCRETE OUTPUT WIRING CONFIGURATION OUTI OUT2 BUS PWR 9979
18. DO block E 9 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Intermediate Stop E 10 A reversible motor requires two contactors One of them swaps two of the motor wires so that it will run in the opposite direction The contactors must never be closed at the same time because that would place a short circuit across one of the three phases Furthermore motors with lots of attached or internal inertia can be damaged if the shaft does not come to rest before starting up in the other direction Sometimes a brake is used to reduce the stopping time The Forward Reverse selector switch has one contact that is closed in the Forward position input 1 and one contact that is closed in the Reverse position input 2 The center of the three position selector is Off The push button controls are Stop input 3 and Start input 4 These require the auxiliary contact on each starter input 5 and 6 A 30 second off delay timer is used The following ladder diagram shows one way of doing this 5 T PERE a am EOL 6 1 3 4 T Out2 Outl s OUTI EO 5 H 2 3 4 T Out1 Out2 t Sse OUT2_EQ 6 H Rung T is equation 1 It is necessary because it is needed in two equations and because the equations would be 80 characters long without the semicolon
19. FF 903 XD ERROR and Block Alarm Subcodes 12 COLLECTION A directory that specifies the number starting indices and DD item IDs of the data collections in each DIRECTORY transducer within a transducer block For further information please refer FF 902 13 EQ1 A boolean equation used to define the computation of EQ1_ VALUE 14 EQ2 A boolean equation used to define the computation of EQ2_ VALUE 15 EQ3 A boolean equation used to define the computation of EQ3 VALUE 16 EQ4 A boolean equation used to define the computation of EQ4_ VALUE 17 EQ5 A boolean equation used to define the computation of EQ5_ VALUE 18 EQ6 A boolean equation used to define the computation of EQ6_ VALUE 19 EQ7 A boolean equation used to define the computation of EQ7_ VALUE 20 EQ8 A boolean equation used to define the computation of EQ8_ VALUE 21 EG9 A boolean equation used to define the computation of EQ9 VALUE 22 EQ10 A boolean equation used to define the computation of EQ10_ VALUE 23 EQ11 A boolean equation used to define the computation of EQ11_ VALUE 24 EQ12 A boolean equation used to define the computation of EQ12_ VALUE 25 EQ13 A boolean equation used to define the computation of EQ13_ VALUE 26 EQ14 A boolean equation used to define the computation of EQ14 VALUE 27 EQ15 A boolean equation used to define the computation of EQ15_ VALUE 28 EQ16 A boolean equation used to define the computation of EQ16_ VALUE 29 OUT1 EQ A boolean equation used to define
20. GRANT DENY 14 lO OPTS 15 STATUS OPTS 16 READBACK D 17 CAS IN D 18 CHANNEL 19 FSTATE TIME 20 FSTATE VAL D 21 BKCAL OUT D 22 RCAS OUT D 23 SHED OPT 24 RCAS OUT D 25 UPDATE EVT 26 BLOCK ALM MULTIPLE DISCRETE The MDI block makes available for the FF network eight discrete variables of INPUT BLOCKS the I O subsystem through its eight output parameters OUT D1 8 Status indication in the OUT Dx output parameters depends on the I O subsystem and the transducer block that is manufacturer specific For example if there is individual detection of sensor failure it can be indicated in the status of related OUT Dx parameter A problem in the interface to the I O subsystem can be indicated in the status of all OUT Dx as BAD Device Failure OUT D1 OUT_D2 OUT D3 Y LI INPUT SNAP OF j CHANNEL TRANSDUCER eed OUT D4 o BLOCK OUTPUTS our os E OUT De amp our pr 2 OUT D8 z Y o co Y co Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table C 6 Parameters and Description Index 1 ak 0 N 10 11 12 13 14 15 16 17 Parameter ST REV TAG DESC STRATEGY ALERT KEY MODE BLK BLOCK ERR CHANNEL OUT D1 OUT D2 OUT D3 OUT D4 OUT D5 OUT D6 OUT D7 OUT D8 UPDATE EVT BLOCK ALM MULTIPLE DISCRETE OUTPUT BLOCK Description The revision level of the static data associated with the function block The use
21. In ladder logic this would be shown as a switch for power to a section of the ladder if there was more than one thing to be turned off In the 848L one contact must be shown for each rung but only one input is required The shutdown contact is input 8 in the drawing below 1 2 5 4 8 Outl BEE RR OULEL LEO The first expression is still AND IN 2 IN 5 The second expression is OR AND IN 2 IN 5 IN 3 The final expression is AND IN 1 OR AND IN 2 IN 5 IN 3 IN 4 IN 8 E 5 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Restart Delay E 6 An off delay timer is required as a permissive for starting the motor When the motor is started the off delay contact opens the circuit for the start button and keeps it open for a specified time The motor will be cooled as it runs so the delay is only applied to the start Motors that require this are usually large and have long cooling times like 30 to 100 minutes Ho EQ1 si 2 T Outl ke SSt see 7 Sot 23 2 25 55 OUTI EQ Channels 1 2 and 3 are the same as for basic motor control T is the off timer Notice that this diagram depends on the order of execution of ladder rungs EQ1 is executed before OUT1_EQ The value of EQ1 is initially false because the motor is not running The start button starts the motor When t
22. Input Output Power Connector Front View Side View le E AOOOOAAO PARAON Hanian paga l 1 7 43 LO 5 al 3 7 93 Dimensions are in inches millimeters A 5 848 848L 848L 06 AA 848L 07 AA 848L 08 AA 848L 09 AA EPS Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Figure A 3 Rosemount 848L Wiring Diagram DISCRETE INPUT WIRING CONFIGURATION TO BUS PWR SIT INS IN6 IN7 IN8 POVVSDBOJD E FIELDBUS 24VDC 2 Wire NAMUR Sensors 1 of 2 Input Connectors INS IN6 IN7 BUS PWR H FIELDBUS 24VDC 24V RTN 3 Wire NAMUR a 1 of 2 Input Connectors TO INS IN6 IN7 IN8 BUS PWR PDOVS DB OD 9922 vo HELL ris FIELDBUS 24VDC Dry Contact Switches 1 of 2 Input Connectors IN5 IN7 IN8 BUS PWR PA HE FIELDBUS 24VDC 9 32 VDC Sensors 1 of 2 Input Connectors DISCRETE OUTPUT WIRING CONFIGURATION TO OUT1 OUT2 OUT3 BUS PWR NS z ES OUTPUT DEVICE w gt W a E gt a E o A 6 FIELDBUS 24VDC 24V RTN m gt Lu a gt a R 3 o OUTPUT DEVICE
23. NOTIFY LIM NOTIFY is the maximum number of alert reports allowed before the operator needs to acknowledge an alarm condition 5 Enable the reports bit in FEATURE SEL 6 Set the resource block to AUTO O TRANSDUCER The 848L is ordered with either Dry Contact VDC or NAMUR Inputs Each BLOCK input can have a filter which determines the minimum time a contact needs to be at a given state to be acknowledged as a state change The following procedure allows the sensors to be configured 1 2 Set MODE BLK TARGET to OOS For each Input n select the parameter IN n CONFIG FILTER a Select the desired filter time in the range of 0 to 128msec Set MODE BLK TARGET to AUTO 3 9 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 LOGIC TRANSDUCER BLOCK 3 10 The 848L can force the outputs to a predetermined state in the event of a device malfunction The following procedure can be used to set the fail safe condition for each output 1 Set MODE BLK TARGET to OOS 2 For each Output n select the parameter OUT n CONFIG FAIL SAFE 3 Select False True or Last Good Value 4 Set MODE BLK TARGET to AUTO Latching Most often the inputs are scanned and the logic eguations processed at a rate greater than the macrocycle freguency To be certain that positive or negative transitions are communicated the inputs eguation results and output values can be latched until read by the function blocks
24. a valve that is supposed to be shut Three valves are arranged in a leak proof configuration as shown vl v2 In gt lt gt lt Out V3 gt lt Bleed 848L DOUBLEBLOCK TIF All three valves are spring return V1 and V2 return to closed V3 returns to open All 3 valves must have closed confirm switches which allows two instances per 848L If open confirms are also used the alarm logic is different and only one instance per 848L is possible V1 and V2 must both confirm closed in order to open the bleed valve by removing power to it V3 must be closed powered to allow V1 and V2 to open Since V1 and V2 operate together they are both powered by the same output The second output operates V3 The close confirms take inputs of the same number as the valve A second instance takes inputs of the same number as the valve plus four Open confirms take inputs of the same number as the valve plus three DO1 is still the open close command The outputs are the same whether or not there are open confirms OUT1 contains AND DO 1 IN 3 OUT2 contains NOT AND NOT DO 1 IN 1 IN 2 For single closed confirms the valve assembly is confirmed open if V1 and V2 do not confirm closed and V3 confirms closed The assembly is confirmed closed if V1 and V2 confirm closed and V3 does not confirm closed The alarm is true if any of these conditions is false after the travel time has expired The equation will not fit on on
25. and will not be detected Mask of FAILED ALM Corresponds bit for bit to FAILED ACTIVE A bit on means that the condition is masked out from alarming Enumerated list of failure conditions within a device Alarm indicating a failure within a device which makes the device non operational Designates the alarming priority of the MAINT_ ALM Enabled MAINT_ ALM alarm conditions Corresponds bit for bit to the MAINT_ ACTIVE A bit on means that the corresponding alarm condition is enabled and will be detected A bit off means the corresponding alarm condition is disabled and will not be detected Mask of MAINT_ ALM Corresponds bit for bit to MAINT_ ACTIVE A bit on means that the condition is masked out from alarming Enumerated list of maintenance conditions within a device Alarm indicating the device needs maintenance soon If the condition is ignored the device will eventually fail Designates the alarming priority of the ADVISE_ ALM C 3 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Table C 1 Resource Block Parameters Number C 4 80 81 82 83 84 85 Parameter ADVISE ENABLE ADVISE MASK ADVISE ACTIVE HEALTH INDEX PWA_ SIMULATE ADVISE_ ACTIVE Description Enabled ADVISE_ ALM alarm conditions Corresponds bit for bit to ADVISE_ ACTIVE A bit on means that the corresponding alarm condition is enabled and will be detected A bit off means the corresponding alarm conditio
26. is just one open confirm on input 1 then the Boolean expression is ALARM TON DO1 8 IN1 DO1 8 IN1 TravelTime It both confirms are used then the Boolean expression is ALARM TON DO1 amp IN2 DO1 8 IN1 IN1 8 IN2 TravelTime The equivalent 848L expressions are TON OR AND NOT DO 1 NOT IN 2 AND DO 1 IN 2 100 TON OR AND DO 1 NOT IN 1 AND NOT DO 1 IN 1 110 TON OR AND NOT DO 1 NOT IN 2 AND DO 1 NOT IN 1 AND IN 1 IN 2 120 The chosen expression goes in the last expression used which must be linked to a DI to generate an alarm A valve actuator may be spring return requiring one output or bistable requiring two outputs Output 1 is used for Open and output 2 for Close Bistable valves often require a short pulse instead of maintained power The 848L expressions for spring return are OUT1 contains DO 1 or bistable has OUT1 contains TP DO 1 30 OUT2 contains TP NOT DO 1 30 The interlock may be wired or internal or from the bus The example uses a DO from the bus OUT1 contains TP AND DO 1 DO 3 30 spring return is AND DO 1 DO 3 OUT2 contains TP OR NOT DO 1 NOT DO 3 30 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Simple Valve Variations Permissive A spring return valve with one close confirm EQ1 contains TON OR AND NOT DO 1 NOT IN 2 AND DO 1 IN 2 100 OUT1 contains DO 1
27. purposes The following procedure is used to simulate a DI output To change the output value place the Target Mode of the block to Manual and then change the OUT_D VALUE to the desired value To simulate both the value and status do the following 1 If the Simulate Switch is in the OFF position move it to ON If the Simulate switch is already in the ON position you must move it to Off an place it back in to the ON position NOTE As a safety measure the switch must be reset every time power is interrupted to the device in order to enable SIMULATE This prevents a device that is tested on the bench from getting installed in the process with SIMULATE still active 2 To change both the OUT_D VALUE and OUT D STATUS of the DI Block set the TARGET MODE to AUTO 3 Set SIMULATE D ENABLE DISABLE to Active 4 Enter the desired values for SIMULATE D SIMULATE VALUE and SIMULATE D SIMULATE STATUS If errors occur when performing the above steps be sure that the SIMULATE switch has been reset after powering up the device The digital output blocks are used to receive a value from another device to be used to either drive a contact output or to use in the logic eguations The DO blocks make their values available to the 848L by placing the value in a variable called DO n where n 1 to 8 Like the DI block all eight outputs can be communicated in a packed format by selecting the appropriate channel number The DO block
28. set to this value SAFE 21 IN 3 TAG An identifier associated with discrete input 3 22 IN3 The value and status of discrete input 3 23 PULSE COUNT 3 The number of pulses that have occurred on IN3 since last reset 24 IN 3 CONFIGIO TYPE The transducer type of discrete sensor 3 24 IN 3 CONFIG FFILTER Any state change on IN3 that lasts for a duration less than this filter value will be ignored by the device 24 IN 3 CONFIGFAIL When the device detects a failure 103 will have its value set to this value SAFE 25 IN 4 TAG An identifier associated with discrete input 4 26 IN4 The value and status of discrete input 4 27 PULSE COUNT 4 The number of pulses that have occurred on IN4 since last reset 28 IN 4 CONFIGIO TYPE The transducer type of discrete sensor 4 28 IN 4 CONFIGFILTER Any state change on IN4 that lasts for a duration less than this filter value will be ignored by the device 28 IN 4 CONFIGFAIL When the device detects a failure 104 will have its value set to this value SAFE C 5 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Table C 2 l O Transducer Parameters Numbe r 29 30 31 32 33 34 35 35 35 36 37 38 39 39 39 40 41 42 43 43 43 44 45 46 47 47 47 48 49 50 51 52 53 53 53 54 55 56 56 56 C 6 Parameter TRANSDUCER TYPE 2 XD ERROR 2 COLLECTION DIRECTORY 2 IN 5 TAG IN5 PULSE COUNT 5 IN 5 CONFIGIO TYPE IN 5 CONFIGF
29. the computation of OUT1_ VALUE 30 OUT2_EQ A boolean equation used to define the computation of OUT2_ VALUE 31 OUT3_ EQ A boolean equation used to define the computation of OUT3_ VALUE 32 OUT4_ EQ A boolean equation used to define the computation of OUT4_ VALUE 33 PARSE_ RESULT A feedback string that displays the result of parsing EQ1 EQ16 and OUT1 EQ OUT4_ EQ 34 EQ1_ VALUE The value and status of the result of computing EQ1 35 EQ2_ VALUE The value and status of the result of computing EQ2 36 EQ3_ VALUE The value and status of the result of computing EQ3 37 EQ4_ VALUE The value and status of the result of computing EQ4 38 EQ5_ VALUE The value and status of the result of computing EQ5 39 EQ6_ VALUE The value and status of the result of computing EQ6 40 EQ7_ VALUE The value and status of the result of computing EQ7 41 EG8 VALUE The value and status of the result of computing EQ8 42 EG9 VALUE The value and status of the result of computing EG9 C 8 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table C 3 Logic Transducer Parameters and Descriptions Number Parameter Description 43 EQ10_ VALUE The value and status of the result of computing EQ10 44 EQ11_ VALUE The value and status of the result of computing EQ11 45 EQ12_ VALUE The value and status of the result of computing EQ12 46 EQ13_ VALUE The value and status of the result of computing EQ13 47 EQ14_ VALUE The value and status of the re
30. the timed out contact comes in at channel 5 Actually this scheme is not practical unless the latches are non volatile 2 ho L1 AA AA AA Seta t EQ1 1 Ni Reset d 5 Pl A EQ2 P1 L2 be e L2 tos SSL preo ss Set Jats ft EQ3 P1 L2 tes 23 58 gt Reset d L1 Outl ses AAG aa eae pce aoe 4 OUT1_EQ P1 4 3 Outl Out2 tas SiS li 25555252026 22955 OUT2 EO 4 4 L1 L2 Out1 Out3 t a KA a a a AE z kra ft OUT3 EQ 3 4 LI L2 Outl Out4 FES SSS aaa SS eee OUT4 EQ 4 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Rung L1 is equation 1 It latches on when the start button is true and unlatches when the NC stop button is pushed The latch remembers start and stop commands to simplify the logic e The expression is RS IN 2 NOT IN 1 Rung P1 is equation 2 which generates a pulse from one read of channel 5 The expression is TON AND OR IN 3 IN 4 NOT EQ 2 30000 Rung L2 is equation 3 The latch determines which motor to start and run It toggles when the life time is reached That stops the running motor after its off delay and enables the other motor to be started The expression is RS AND EQ 2 NOT EQ 3 AND EQ 2 EQ 3 Rung Out1 is output equation 1 A timed start pulse is delivered to both motor ci
31. this function s register The remaining bits are shifted right by 1 bit position When reset is true all 8 bits in this function s register will be cleared to zero reset is an optional parameter and will always be considered false if it is not present The result of this function is the value of bit number bit in the register SR 2 2 SR set reset 10 This function is a set dominant latch When set is true this function will set its state to true regardless of the value of reset When reset is false the function s state will have a false value until set has had at least 1 true reading after which the state will remain true When reset is true the function s state will be set to the value of set The result of this function is the function s state TOF 2 2 TOF a time 10 This function is an off delay When a is true this function will set its output to true When a transitions to false the function s output will remain true for time 100 milliseconds before going false D 3 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table D 1 Supported Functions Required number Maximum number of parameters of parameters Maximum Function Name Instances Function Description TON TP XOR ERROR HANDLING D 4 2 TON a time 10 This function is an on delay When a is false this function will set its output to false When a transitions to true the fu
32. to Valve Control F 1 Valve Control Alas i208 sae hei aa ow eae AA ee AA F 2 Variations on Valve Control F 2 Boolean Expressions F 3 Basic Valve Control F 3 Open Auto Close F 4 Alarmi VariatiOns 2 722 na ii rats a Sage ar Seis Batwa eee ek F 4 Output Variations F 4 Output with Interlock F 4 Simple Valve Variations F 5 Permissive ica Cal BAe Man ae SN ated ae F 5 Double Block and Bleed F 6 Motorized Valve ois ee a ees kd AY a ede wins aces F 7 Heat Exchange Medium Selection F 7 TOC 3 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 TOC 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Section 1 SAFETY MESSAGES Warnings ROSEMOUNT Introduction Safety Messages page 1 1 O AA AA a de ja AA page 1 2 Return of Materials page 1 3 Instructions and procedures in this section may require special precautions to ensure the safety of the personnel performing the operations Information that potentially raises safety issues i
33. transmitter should be securely fastened to the DIN rail 848L without enclosure DIN Rail Mounting Clip When inside of a plastic or aluminum junction box the 848L mounts to a panel using four 4 20 x 1 25 in screws When inside of a stainless steel junction box the 848L mounts to a panel using two 4 20 x 2 in screws Aluminum Plastic Stainless Steel 848L with aluminum or plastic box Cover Screws 4 848L with a stainless steel box Mounting Screws 2 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Mounting to a 2 Inch Pipe Stand Use the optional mounting bracket option code B6 to mount the 848L to a 2 inch pipe stand when using a junction box Aluminum Plastic Junction Box styles JA and JP Side View HA 6 6 167 fully assembled lt 7 FA Front View Stainless Steel Junction Box style JS Front View Side View T T 1 i ARAS es 1 T45 i 14 7 5 190 fully m m assembled o Dimensions are in inches millimeters Aluminum Plastic Junction Box Mounted on a Vertical Pipe Stainless Steel Junction Box Mounted on a Vertical Pipe 2 3 848 848A52A B 53A B 848 848A54A 55A Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 WIRING Figure 2 3 848L Transmitter Fieldbus Wiring Power Supply Connections 2 4
34. 480000 15 s Network address is not in polled range Power to the device is below the 9 VDC minimum Set first Unpolled Node and Number of UnPolled Nodes so that the device address is within range Increase the power to at least 9V Noise on the power communication is too high Verify terminators and power conditioners are within specification Verify that the shield is properly terminated and not grounded at both ends It is best to ground the shield at the power conditioner LAS Scheduler was not downloaded to the Backup LAS device Ensure that all of the devices that are intended to be a Backup LAS are marked to receive the LAS schedule Live list must be reconstructed by Backup LAS device Current link setting and configured links settings are different Set the current link setting equal to the configured settings Possible Causes Target mode not set Memory Failure Communication Failure Body Temperature Failure Corrective Action Set target mode to something other than OOS BLOCK_ERR will show the lost NV Data or Lost Static Data bit set Restart the device by setting RESTART to Processor If the block error does not clear call the factory No I O Power Ensure power at I O Power Terminals are between 9 32 VDC Features FEATURE_SEL does not have Alerts enabled Enable the report bit Notification LIM_NOTIFY is not high enough Set equal to MAX_NOTIFY I O Transducer and Logic Block Tro
35. 8 MO OPTS FSTATE TIME FSTATE VAL D1 FSTATE VAL D2 FSTATE VAL D3 FSTATE VAL D4 FSTATE VAL D5 FSTATE VAL D6 FSTATE VAL D7 FSTATE VAL D8 FSTATE STATUS UPDATE EVT BLOCK ALM CHANNEL 848 848L DISCRETE3 EPS Index Parameter Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Appendix D Logic Equation Syntax Error Handlingi s sesa ns ean dete K ee page D 4 Examples NA tt NI een ata izvaja page D 5 1 2 ROSEMOUNT All lines shall end with a semi colon Accepted characters shall be standard 7 bit ASCII characters from the list below A Z a z 0 9 comma parenthesis space semicolon _ underscore The maximum number of characters per equation shall be 80 Function calls are in the form FUNC PARAM1 PARAM2 PARAMN where FUNC is one of the supported functions in Table D 1 on page D 2 and PARAM x are expressions to be input to the function Function names must be one of the names listed in the table below All spaces shall be ignored except within function names and function parameters The parameters in a function call shall contain at least the required parameters shown in table 2 but no more than the maximum The number of times a function is used totaled in all equations must be less than or equal to the maximum number of instances allowed shown in Table D 1 on page D 2 Each equation must evaluate to a single boolean value EMERSON www
36. D RISE EQ 2 NOT EQ 4 AND RISE EQ 2 EQ 4 Rung Out1 is output equation 1 This is basic alternate motor control The expression is AND EQ 1 OR EQ 2 IN 3 NOT EQ 4 NOT OUT 2 Rung Out2 is output equation 2 This is also basic alternate motor control The expression is AND EQ 1 OR EQ 2 IN 4 EQ 4 NOT OUT 1 E 15 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 E 16 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Appendix F INTRODUCTION TO VALVE CONTROL ROSEMOUNT Valve Control Introduction to Valve Control page F 1 Industrial valves have two general classifications regulating and block A regulating valve is designed to be stable at any one of a nearly infinite set of positions between open and closed They are mostly used in control loops so that nonlinearity and friction are corrected by feedback control A block valve is designed to be either tight shut or wide open They are mostly used to change the configuration of process equipment such as a heat exchanger that can be used to heat or cool but not both at the same time Block valves configure steam in and condensate out for heating or chilled brine in and return for cooling Regulating valves are being used as block valves when the actual position of the valve must be known but analog outputs are used Block valves generally have some kind of switch tha
37. DD_ REV 14 GRANT_ DENY 15 HARD_ TYPES 16 RESTART 17 FEATURES 18 FEATURE_ SEL 19 CYCLE_ TYPE 20 CYCLE_ SEL 21 MIN CYCLE T 22 MEMORY SIZE ROSEMOUNT Available configuration memory in the empty resource To be checked before attempting a download EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Table C 1 Resource Block Parameters Number 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 C 2 Parameter NV CYCLE T FREE SPACE FREE TIME SHED RCAS SHED ROUT FAULT STATE SET FSTATE CLR FSTATE MAX NOTIFY LIM NOTIFY CONFIRM TIME WRITE LOCK UPDATE EVT BLOCK ALM ALARM SUM ACK OPTION WRITE PRI WRITE ALM ITK VER DISTRIBUTOR DEV STRING XD OPTIONS FB OPTIONS DIAG OPTIONS MISC_ OPTIONS RB SFTWR REV MAJOR RB SFTWR REV MINOR RB SFTWR REV BUILD RB SFTWR REV ALL HARDWARE REV Description Minimum time interval specified by the manufacturer for writing copies of NV parameters to non volatile memory Zero means it will never be automatically copied At the end of NV CYCLE T only those parameters which have changed need to be updated in NVRAM Percent of memory available for further configuration Zero in preconfigured resource Percent of the block processing time that is free to process additional bl
38. ILTER IN 5 CONFIG FAIL_ SAFE IN 6 TAG IN6 PULSE COUNT 6 IN 6 CONFIGIO TYPE IN 6 CONFIGFILTER IN 6 CONFIGFAIL SAFE IN 7 TAG IN7 PULSE COUNT 7 IN 7 CONFIGIO TYPE IN 7 CONFIGFILTER IN 7 CONFIGFAIL SAFE IN 8 TAG IN8 PULSE_COUNT_8 IN 8 CONFIGIO TYPE IN 8 CONFIGFILTER IN 8 CONFIGFAIL SAFE TRANSDUCER TYPE 3 XD ERROR 3 COLLECTION DIRECTORY_3 OUT_1_ TAG OUT1 OUT 1 CONFIG IO TYPE OUT_1_ CONFIG FILTER OUT 1 CONFIGFAIL SAFE OUT 2 TAG OUT2 OUT 2 CONFIGIO TYP E OUT 2 CONFIG FILTER OUT 2 CONFIGFAIL SAFE Description Identifies the transducer that follows One of the error codes defined in FF 903 XD ERROR and Block Alarm Subcodes A directory that specifies the number starting indices and DD item IDs of the data collections in each transducer within a transducer block For further information please refer FF 902 An identifier associated with discrete input 5 The value and status of discrete input 5 The number of pulses that have occurred on IN5 since last reset The transducer type of discrete sensor 5 Any state change on IN5 that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure 105 will have its value set to this value An identifier associated with discrete input 6 The value and status of discrete input 6 The number of pulses that have occurred on IN6 since last reset The transducer type of discrete sensor
39. Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Logic Transmitter with FOUNDATION Fieldbus Product Discontinued k HO E dna ima ina BINS ING ONT ins MAM OUT OUT GUT OUTS AAA POBRE LO 40 0 4 00 2000 EF FOUNDATION ROSEMOUNT www rosemount com EMERSON Process Management Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L ROSEMOUNT Rosemount 848L Discrete Logic Temperature Transmitter with FOUNDATION Fieldbus NOTICE Read this manual before working with the product For personal and system safety and for optimum product performance make sure to thoroughly understand the contents before installing using or maintaining this product The United States has two toll free assistance numbers and one international number Customer Central 1 800 999 9307 7 00 a m to 7 00 P M CST National Response Center 1 800 654 7768 24 hours a day Equipment service needs International 1 952 906 8888 Z CAUTION The products described in this document are NOT designed for nuclear qualified applications Using non nuclear qualified products in applications that require nuclear qualified hardware or products may cause inaccurate readings For information on Rosemount nuclear qualified products contact a Emerson Process Management Sales Representative Cover photo 848 848C004 EMERSON www rosemount com Pr
40. Restart Delay diagram which reduces it to a permissive circuit 1 2 4 Outl t 4 OUT1 EO 3 The equations for a permissive circuit have already been described e The expression is AND IN 1 OR AND IN 2 IN 4 IN 3 NOTE This is not an interlock for high winding temperature That is taken care of by the overloads The purpose of this circuit is to prevent starting if the motor is too hot such that the heat generated by starting would exceed the temperature rating of the motor When the motor starts the temperature will rise and open the safe temperature contact This will happen after the auxiliary contact has closed so the motor will continue to run As it runs it is cooled by an internal fan and eventually the safe temperature contact closes An interlock could be added but the temperature would have to be set much higher than the safe restart temperature Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Hand Off Auto The HOA switch has one contact that is closed in the Hand position input 1 and one contact that is closed in the Auto position input 2 Both contacts are open in the Off position The local hand controls are Stop input 3 and Start input 4 These require the auxiliary contact on the starter input 5 Auto control is done in some DCS function blocks that generate a Run signal which is linked ov
41. Restart Processor 4 2 FEATURES ADVISE MASK 3 7 Restart with Defaults 4 2 FEATURES SEL 3 5 ADVISE PRI 3 7 Resource Block 3 4 Features coco 3 4 Advisory 3 7 FEATURES FEATURES SEL 3 4 Configuration 3 9 D Features 3 4 FAILED ACTIVE 3 6 DIN Rail Reports 3 4 FAILED ALARMS 3 6 Mounting 2 2 Soft W Lock Hard WLock 3 5 FAILED ALM 3 6 Discrete Input Block C 9 Unicode 3 4 FAILED ENABLED 3 6 Parameters lt 4 i l l i l l Cao Foundation Fieldbus 4 1 FAILED MASK 3 6 Discrete Input Blocks Check papa Dna aaah 4 2 FAILED PRI 3 6 Multipule C 12 Troubleshooting 4 3 MAINT_ACTIVE 3 7 Discrete Output Block C 11 Function Block MAINT ALARMS 3 7 P 3 Specifications A 4 arameters C 12 d MAINT ALM 3 7 Discrete Output Blocks Functional MAINT ENABLED 3 7 Multipule C 13 Specifications A 1 MAINT MASK 3 7 Drawing MAINT PRI ayay aasa ga az Switch Location 2 5 G PlantWeb 3 6 3 8 f ale cont dao F 2 Drawings l General Block Information Analog Input Block Diagram E 4 1 Block Instantiation ibaon Sahin 3 2 Gro nd
42. T MAINT_MASK 3 7 LIM_NOTIFY 3 5 MAINT PRI 3 7 MODE BLK TARGET 3 2 MAX NOTIFY VER A TNA 3 5 MOB SES TEND pss nG MODE BLK TARGET 3 2 MODE BLOCK ACTUAL 3 2 Network 3 4 RECOMMENDED ACTION 3 8 REPORTS 3 4 Index 2 Reference Manual 00809 0100 4696 Rev AA 9 17 04 Rosemount 848L T Tagging 2 8 Commissioning 2 8 SENSOR ai balana 2 8 Transmitter 2 8 Timer Recommendations Host 3 4 Transients 2 5 Transmitter TAQ iia eh 2 8 Troubleshooting 4 3 Foundation Fieldbus 4 3 Resource Block 4 3 Types of Modes AUTO dna Peas cdot enh nina s ao 3 2 Man Sekirei cae oa 3 2 Other Types of Modes 3 2 Out of Service 3 2 U Unicode 3 4 V Valve Control F 1 Alarms ud bd F 2 Boolean Expressions F 3 Virtual Communication Relationship VERS tata sis 3 4 Network Parameters 3 4 Ww WING acia napa pw Qo ee 2 4 Communication Check 4 2 Diagram A 6 Power Check 4 2 Index 3 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L 9 17 04 Index 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc PlantWeb is a registered tradema
43. a trip because it is mechanically like tripping an alarm mechanism Alarms are said to trip because the early electric bank alarms used a trip wire to detect a robber The trip is supposed to happen before the motor windings overheat and destroy their insulation After things have cooled off and someone has removed the cause of the overload a reset button must be pressed to close the heat triggered mechanical latch for the overload contact This allows power to flow in the solenoid circuit again The solenoid runs at a lower voltage than the motor called the control voltage This voltage is taken from a transformer within the contactor enclosure that is connected to two of the supply wires The circuit breaker for the contactor may be in another box somewhere When the breaker is turned off or trips the contactor enclosure is electrically dead even for the control voltage The contactor s solenoid may run at a higher voltage to get enough power to move the contact assembly against its springs A pilot relay is used to switch that voltage within the enclosure The control voltage seldom exceeds 120 VAC or is less than 24 VAC One side of the control voltage is always grounded Both the overload mechanism and the pilot relays are now available in solid state form The enclosure containing the contactor overload mechanism and control power supply may be called a motor starter The contactor s solenoid or that of the pilot relay carrying c
44. a 10 This function is a falling edge trigger When a transitions from true to false this function s result is true otherwise it is false ICF 1 1 ICF channel number NO LIMIT This function s result will be true for one execution cycle if the value of the requested device input has had at least one falling transition since the last execution cycle This is ideal for capturing events that occur faster then the logic execution cycle ICR 1 1 ICR channel number NO LIMIT This function s result will be true for one execution cycle if the value of the requested device input has had at least one rising transition since the last execution cycle This is ideal for capturing events that occur faster then the logic execution cycle IN 1 1 IN channel number NO LIMIT This function s result will be the value of the requested device input NOT 1 1 NOT a NO LIMIT This function s result will be the logical not of a OR 2 10 OR a b NO LIMIT This function s result will be the logical or of a b OUT 1 1 OUT channel number NO LIMIT This function s result will be the value of the requested device output D 2 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table D 1 Supported Functions Required number Maximum number Maximum Function Name of parameters of parameters Function Description Instances PS 2 2 PS channel number divisor 10 This function is a frequency prescaler This fu
45. al 00809 0100 4696 Rev AA September 2004 Figure A 1 Temperature vs Output Current A 2 Outputs 4 Discrete Outputs 9 32 VDC loads Maximum load inductance 300 mH Current Ratings 1 0 A maximum for single channel on 4 0 A maximum per device Output devices must be selected as follows 1 Designed to use the same DC voltage as supplied to the 848L I O power terminals 2 The DC resistance must be large enough that they consume no more than 1 amp of current steady state The internal impedance of the 848L is negligible therefore the Output device s current is simply calculated as I O power DC resistance 3 The inductance of the output device must be less than 300 mH The maximum total output current for the device will depend on the ambient temperature as shown in Figure A 1 1 5 Total Output Current Amps N 1 0 0 5 45 50 55 do 6 7 5 Ambient Temperature DegC Thermal Shutdown Protection prevents damage to the device if temperature specifications are exceeded Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Isolation Input Output 1200 VDC 600 V rms 50 60 Hz for dry and 2 wire NAMUR contact inputs No isolation when using 3 wire sensors Input Foundation Fieldbus 1200 VDC 600 V rms 50 60 Hz Output Foundation Fieldbus 1200 VDC 600 V rms 50 60 Hz Input power Foundation Fieldbus 1200 VDC 600 V rms 50 60 Hz Input Output Power Req
46. arameter of all PS function calls in the logic equations ADVISORY NV Write Deferred Reduce the frequency in which applications write to NV Memory PWA Simulate Active Disable PWA SIMULATE parameter in the Resource Block Secondary Value Ensure that the transmitter is not too close to MAINTENANCE Degraded l AATABIE hot or cold environments l Configuration Error Verify that the Logic equations are correct in the Logic transducer block Electronics Failure Replace the electronics NV Memory Failure Replace the electronics No I O Power Check the IO Power supply polarity wiring FAILED and connections Primary Value Failure Secondary Value Failure Check the sensor configuration wiring and connection for open or shorted sensors Verify that the body temperature is within the operating limits of this device Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemou nt 848 L Alarms Use the following steps to configure the alarms which are located in the Resource Block 1 Set the resource block to OOS 2 Set WRITE PRI to the appropriate alarm level WRITE_PRI has a selectable range of priorities from 0 to 15 Set the other block alarm parameters at this time 3 Set CONFIRM TIME to the time in 32 of a millisecond that the device will wait for confirmation of receiving a report before trying again the device does not retry if CONFIRM_TIME is 0 4 Set LIM_NOTIFY to a value between zero and MAX
47. art When the start button is pressed the pump that was not in use is started Not in use refers to now or since the last time start was pressed E 3 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 WRITING 848L EQUATIONS Basic Motor Control E 4 Timed Switch The pumps have a known life time within an acceptable risk so one pump is allowed to run until that time expires The other pump automatically takes over at that time Switch on Failure If a process condition can be sensed that says the running pump failed then the other pump is started regardless of the starting protocol It is not easy to convert a functional diagram to an 848L equation because all of the functions must be nested in the proper order One way to begin the process is to draw the functional diagram in ladder logic The following is a basic two button and auxiliary contact motor control that is drawn with channel numbers 1 2 Outl OUTI EO Input 1 is from a normally closed stop button which does not have to be inverted in the equation This is true for all stop buttons in the following examples Input 2 is from the normally open start button and Input 3 is from the contactor s auxiliary contact The ladder coil shown is at Out1 which is the value of output equation 1 Wires from output 1 will switch power from the control voltage to the contactor s solenoid or pilot rela
48. at is constrained to be in the range of 1 to 8 The reset function is optional If reset is present and true the 8 bit register is cleared to zero and the result of the function is false Otherwise if shift is true then bit 7 will be moved to bit 8 bit 6 to bit 7 bit 5 to bit 6 bit 4 to bit 5 bit 3 to bit 4 bit 2 to bit 3 bit 1 to bit 2 and the value of input will become the value of bit 1 Then the bit specified by testbit will be tested to determine the value of the function Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L SHR input shift reset testbit The parameters input shift and reset are functions The parameter testbit is a constant that is constrained to be in the range of 1 to 8 The reset function is optional If reset is present and true the 8 bit register is cleared to zero and the result of the function is false Otherwise if shift is true then bit 2 will be moved to bit 1 bit 3 to bit 2 bit 4 to bit 3 bit 5 to bit 4 bit 6 to bit 5 bit 7 to bit 6 bit 8 to bit 7 and the value of input will become the value of bit 8 Then the bit specified by testbit will be tested to determine the value of the function The following procedure is used to enter the logic equations 1 Set MODE BLK TARGET to OOS 2 Enter the equations in parameters EQn where n 1 to 16 or OUT1 EQ OUT2 EQ OUT3 EQ or OUT4 EQ Each equation ending with a semicolon 3 Set the MODE BLK TARGET to AUTO The equat
49. cation 0X810AAC05 TAG Transmitter Tag Hardware e tagged in accordance with customer requirements permanently attached to the transmitter Software the transmitter can store up to 30 characters if no characters are specified the first 30 characters of the hardware tag will be used Sensor Tag Hardware a plastic tag is provided to record identification of the I O in the field the tag can be removed printed on and reattached to the transmitter Software e the I O Transducer Block provides the ability to record the I O tags Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L TRANSMITTER LABEL Figure 2 7 Transmitter Label ROSEMOUNT 848LFANCS001 PDTAG SERIAL NO 12345678 DEVICE ID 00151848D FCA 848L Input Type Dry Contaci Output Type 9 32 VDC DISCRETE LOGIC CHANHASSEN MN USA FOUNDATION TYPE 113 Bus Powered C N96 A ON COMPONENT APPROVED TO BE PROVED INSTALLED IN P54 ENCLOSURE a SECURITY Ui 32Vdc MAX REV AA 00848 1510 1001 REV AB ODD TERMINALS EVEN TERMINALS 848 848_21_AA EPS Pi E i Gg a 113 G Baseefa04ATEX0026U a EEx nA nl T4 40 C lt Tamb lt 50 C NOT USED E FOUNDATION SIMULATE ENABLE NC INSTALLATION Using Cable Glands Use the following steps to install the 848L with Cable Glands 1 Remove the junction box cover by unscrewing the four cover screws 2 Run the sensor and power signal
50. ce that will make the device or some part of the device non operational This implies that the device is in need of repair and must be fixed immediately There are five parameters associated with FAILED ALARMS specifically they are described below FAILED ENABLED This parameter contains a list of failures in the device which makes the device non operational that will cause an alarm to be sent Below is a list of the failures with the highest priority first Electronics Failure NV Memory Failure No I O Power Primary Value Failure nb wWwN gt Secondary Value Failure FAILED_MASK This parameter will mask any of the failed conditions listed in FAILED ENABLED A bit on means that the condition is masked out from alarming and will not be reported FAILED_PRI Designates the alarming priority of the FAILED_ALM The default is 0 and the recommended value is between 8 and 15 FAILED_ACTIVE This parameter displays which of the alarms is active Only the alarm with the highest priority will be displayed This priority is not the same as the FAILED PRI parameter described above This priority is not user configurable FAILED_ALM Alarm indicating a failure within a device which makes the device non operational Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L MAINT_ALARMS A maintenance alarm indicates the device or some part of the device needs maintenance soon If the condition is ignored the device
51. ck types that are supported by the device Instantiation does not apply to standard device blocks like the Resource I O Transducer and Logic Transducer Block Block instantiation is done by the host control system or configuration tool but not all hosts are required to implement this functionality Please refer to your specific host or configuration tool manual for more information 3 3 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Capabilities Virtual Communication Relationship VCRs There are a total of 20 VCRs Two are permanent and 18 are fully configurable by the host system 25 link objects are available Network Parameter Value Slot Time 8 Maximum Response Delay 4 Maximum Inactivity to Claim LAS Delay 60 Minimum Inter DLPDU Delay 7 Time Sync class 4 1ms Maximum Scheduling Overhead 21 Per DLPDU PhL Overhead Maximum Inter channel Signal Skew Required Number of Post transmission gap ext Units Required Number of Preamble extension Units sas 00A Host timer recommendations T1 96000 T2 1920000 T3 480000 Block Execution times Discrete Input 40 ms Discrete Output 40 ms Multiple Discrete Input 40 ms Multiple Discrete Output 40 ms RESOURCE BLOCK FEATURES and The parameters FEATURES and FEATURE_SEL determine optional FEATURES SEL behavior of the Rosemount 848L FEATURES The FEATURES parameter is read only and defines which features are supported by the Rosemoun
52. ct was exposed The center will provide A Return Material Authorization RMA number e Instructions and procedures that are necessary to return goods that were exposed to hazardous substances For other locations please contact an Emerson Process Management sales representative NOTE If a hazardous substance is identified a Material Safety Data Sheet MSDS reguired by law to be available to people exposed to specific hazardous substances must be included with the returned materials Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Section 2 SAFETY MESSAGES Warnings MOUNTING ROSEMOUNT Installation Safety Messages page 2 1 Mounting a a ate hate eee ies Pa ANG page 2 1 WINING ete tated E cae Pat eh Pe ne page 2 4 Grounding isis oe Fee el a A ec ee v page 2 5 SWITCHES AG NA iat ats eee ae NG page 2 5 VO Wiring sis eee ee eerie eee eet eee eee nea ei page 2 7 Tagging sist pi ska hee EN heed Pie AA A page 2 8 Transmitter Label page 2 9 Installation se sise o en gene ae fee toes page 2 9 Instructions and procedures in this section may require special precautions to ensure the safety of the personnel performing the operations Information that potentially raises safety issues is indicated by a warning symbol A Please refer to th
53. does not drive the outputs directly but sets the state of the internal variables DO n To drive an output from the DO block the DO n variable is placed in one of the output eguations OUT1_EQ DO 1 The MDI block allows 8 values with their status in one block with 8 individual outputs The 8 values are selected by one of the Array channel numbers The MDO block allows 8 output values with their status in one block with 8 individual inputs The 8 values are selected by the Array Outputs channel number 3 21 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 3 22 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Section 4 SAFETY MESSAGES Warnings FOUNDATION FIELDBUS INFORMATION ROSEMOUNT Operation and Maintenance Safety Messages page 4 1 Foundation Fieldbus Information page 4 1 Hardware Maintenance page 4 2 Troubleshooting page 4 3 Instructions and procedures in this section may reguire special precautions to ensure the safety of the personnel performing the operations Information that potentially raises safety issues is indicated by a warning symbol A Please refer to the following safety messages before performing an operation preceded by this symbol Failure to follow these installation guidelines could result in death o
54. e Invert I O option can be used to do a Boolean NOT function on the setpoint value The SP_D supports the full cascade sub function Cas mode must be used to transfer the output of another block to the SP_D of the DO There are additional I O options which will cause the SP D value to track the PV D value when the block is in an actual mode of LO or Man The 848L does not support a readback value in which case READBACK_D is generated from OUT_D The OUT_D and READBACK_D parameters both use XD_STATE The PV_D and SP_D use PV_STATE O S LO Iman Man Auto Cas and RCas The Man mode can be used to force the output in a PLC sense It may be that Man mode is not permitted but it must be supported so that Man mode may be entered when leaving O S The IMan mode is used to indicated that there is no path to the final element IMAN is not used in the 848L BKCAL_OUT_D ___ RCAS OUT D Setpoint Optional Output Invert CAS_IN_D i OUT_D RCASIND CHANNEL Simulate SPUD PVD SIMULATE_D move Optional ta SHED_OPT Invert ALO READBACK D 848 848L DISCRETE2 EPS C 11 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Table C 5 Parameters Index Parameter 1 ST_REV 2 TAG_DESC 3 STRATEGY 4 ALERT_KEY 5 MODE_BLK 6 BLOCK_ERR 7 PV D 8 SP D 9 OUT D 10 SIMULATE D 11 PV STATE 12 XD STATE 13
55. e a direct impact on the device s primary functions Below is a list of the advisories with the highest priority first 1 Prescaler Overflow 2 NV Write Deferred 3 PWA Simulate Active ADVISE_MASK The ADVISE MASK parameter will mask any of the failed conditions listed in ADVISE ENABLED A bit on means the condition is masked out from alarming and will not be reported ADVISE_PRI ADVISE_PRI designates the alarming priority of the ADVISE_ALM The default is 0 and the recommended value is 1 or 2 3 7 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Table 3 1 RB RECOMMENDED ATION 3 8 ADVISE_ACTIVE The ADVISE_ACTIVE parameter displays which of the advisories is active Only the advisory with the highest priority will be displayed This priority is not the same as the ADVISE_PRI parameter described above This priority is not user configurable ADVISE_ALM ADVISE_ALM is an alarm indicating advisory alarms These conditions do not have a direct impact on the process or device integrity Recommended Actions for PlantWeb Alarms RECOMMENDED_ACTION The RECOMMENDED ACTION parameter displays a text string that will give a recommended course of action to take based on which type and which specific event of the PlantWeb alarms is active Alarm Type NONE Failed Maint Advise Active Event None Prescaler Overflow Recommended Action Text String No action required Check the Divisor p
56. e an emergency shutdown requirement for all motors This requires a contact or logic input for all affected motor controls For example there is an emergency stop button for a natural gas processing plant located near the exit so that the operator can hit it while running away Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Restart Delay A motor may be used in a condition where starting is difficult causing the motor to heat rapidly until it gets running That heat must be allowed to dissipate before the motor is started again A simple time delay prevents the start button from working until a fixed delay time expires Another example is the time required for compressor head pressure to bleed off after the compressor motor stops Maximum Restarts Another way of handling difficult starts is to count the number of starts in a given time and lock out the start button if the count is exceeded Locking it out means that the start button will not function until a latching relay has been manually reset by an operator who has verified the safety of the situation Winding temperature The above restart limiters may not be necessary if the winding temperature can be measured and used as a permissive for starting The winding temperature sensor may be a ten ohm length of copper wire that is wound into the motor along with the power windings Hand Off Auto An operator may be required to perform some function near
57. e apparatus cable gland or blanking plug Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Appendix C RESOURCE BLOCK Function Blocks Resource Block Parameters page C 1 I O Transducer Parameters page C 5 Logic Transducer Parameters page C 8 Discrete Input Block page C 9 Discrete Output Block page C 11 Multiple Discrete Input Blocks page C 12 Multiple Discrete Output Block page C 13 Description The revision level of the static data associated with the function block The user description of the intended application of the block The strategy field can be used to identify grouping of blocks The identification number of the plant unit The actual target permitted and normal modes of the block For further description see the Mode parameter formal model in FF 890 This parameter reflects the error status associated with the hardware or software components associated with a block Multiple errors may be shown For a list of enumeration values see FF 890 Block_ Err formal model State of the function block application state machine For a list of enumeration values see FF 890 Read write test parameter used only for conformance testing String identifying the tag of the resource which contains the Device Descriptio
58. e following safety messages before performing an operation preceded by this symbol AWARNING Failure to follow these installation guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Electrical shock could cause death or serious injury If the device or sensors are installed in a high voltage environment and a fault condition or installation error occurs high voltage may be present on transmitter leads and terminals Use extreme caution when making contact with the leads and terminals The 848L is always mounted remote from the sensors and output devices There are three mounting configurations e Toa DIN rail without an enclosure To a panel with an enclosure e Toa 2 in pipe stand with an enclosure using a pipe mounting kit EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Mounting to a DIN Rail Without an Enclosure Figure 2 1 Mounting the 848L to a DIN Rail Mounting to a Panel with a Junction Box Figure 2 2 Mounting the 848L junction box to a panel 2 2 To mount the 848L to a DIN rail without an enclosure follow these steps 1 Pull up the DIN rail mounting clip located on the top back side of the transmitter 2 Hinge the DIN rail into the slots on the bottom of the transmitter 3 Tilt the 848L and place onto the DIN rail Release the mounting clip The
59. e for an input to turn on and turn off during an equation evaluation cycle so that it would not be seen by an IN i function Each input has a counter for transitions rise or fall A transition is based on the output of the debounce filter not the raw input Filtering can be set to zero The counter is read and cleared at the beginning of each evaluation cycle The method relies completely on the counter and does not use the latch configuration The ICR i function is true for one evaluation cycle if a rising transition occurred and its opposite ICF i is true for a falling transition Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L PS When the hardware input consists of a continuous train of pulses at a rate less than 500 PPS a prescaler can be used to reduce the pulse rate to something that does not change faster than the equation evaluation rate The function is PS i divisor where i is the channel number 1 8 and divisor is the number of pulses to count before setting its output true for one equation evaluation cycle The counter rolls over at divisor and keeps counting The user must assure that there is always at least one execution cycle with a false value from PS for every true value If the pulse rate exceeds the divisor times two then the function returns Bad status and optionally a PlantWeb alert can be sent Only ten of these functions are available because they require storage fo
60. e line so two must be used EQ1 contains AND NOT DO 1 OR NOT IN 1 NOT IN 2 IN 3 EQ2 contains TON OR AND DO 1 OR IN 1 IN 2 NOT IN 3 EQ 1 110 For both confirms the valve assembly is confirmed closed if V1 and V2 confirm closed and V3 confirms open The assembly is confirmed open if V1 and V2 confirm open and V3 confirms closed EQ1 contains AND NOT DO 1 NOT AND IN 1 IN 2 IN 6 EQ2 contains TON OR AND DO 1 NOT AND IN 4 IN 5 IN 3 EQ 1 140 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Motorized Valve Heat Exchange Medium Selection The motor runs forward to open the valve and reverse to close it When the motor is off the valve cannot move Both confirms are required Output 1 causes the motor to run forward Output 2 is reverse Only one output must be active at a time Input 1 confirms that the valve is open and input 2 confirms closed OUT1 contains AND DO 1 NOT IN 1 NOT EQ 2 OUT2 contains AND NOT DO 1 NOT IN 2 NOT EQ 2 The alarm interacts with the motor drive so that power is not applied after the travel time expires This prevents burnout of small motors that do not have a motor starter A crack time alarm is also used in case the valve is stuck Since this works even for small motors there is no point to making it optional The crack time is 5 seconds in this example and the travel time is 30 seconds EQ1 contains TON OR AND IN 1 IN
61. e lock select bits are mutually exclusive and the hardware select has the highest priority When the HW_SEL bit if set to 1 on the SW SEL bit is automatically set to 0 off and is read only FEATURE SEL FEATURE SEL is used to turn on any of the supported features The default setting of the Rosemount 848L does not select any of these features Choose one of the supported features if any MAX NOTIFY The MAX NOTIFY parameter value is the maximum number of alert reports that the resource can have sent without getting a confirmation corresponding to the amount of buffer space available for alert messages The number can be set lower to control alert flooding by adjusting the LIM NOTIFY parameter value If LIM NOTIFY is set to zero then no alerts are reported 3 5 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 PlantWeb Alarms 3 6 The Resource Block will act as a coordinator for PlantWeb alarms There will be three alarm parameters FAILED ALARM MAINT ALARM and ADVISE ALARM which will contain information regarding some of the device errors which are detected by the transmitter software There will be a RECOMMENDED ACTION parameter which will be used to display the recommended action text for the highest priority alarm FAILED ALARM will have the highest priority followed by MAINT ALARM and ADVISE ALARM will be the lowest priority FAILED ALARMS A failure alarm indicates a failure within a devi
62. e of sufficient size to ensure that the voltage across the bus terminals does not go below 9 VDC The power terminals are not polarity sensitive To power the electronics and establish communications 1 Connect the fieldbus wires to the terminals marked Bus as shown in Figure 2 4 on page 2 5 2 Tighten the terminal screws to ensure adequate contact Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Figure 2 4 Bus location on the Rosemount 848L CR m o 1 ce Cle N96 APPRON pr BUS PWR PSDO iy JOGO SECURI SIMULATE ENABLE E NOT USED E 22 00848 1510 1001 REV AB N IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 OUTI OUT2 OUT3 OUT4 N OOVVGSAA 1OVOSOSOA VOVSTESOO 848 848L 848L 19 AA EPS Input Output Power The discrete I O requires a 9 32VDC power supply that is separate from the fieldbus power The voltage level will depend on the type of sensors being used and outputs being driven To power the I O 1 Connect the positive lead from the power supply to the terminal marked PWR 2 Connect the return lead to the terminal marked PWR 3 Tighten the terminal screws to ensure adequate contact N Surges Transients The transmitter will withstand electrical transients encountered through static discharges or induced switching transients However a transien
63. e reported without clearing the Active status if the subcode has changed The current alert status unacknowledged states unreported states and disabled states of the alarms associated with the function block Selection of whether alarms associated with the block will be automatically acknowledged Priority of the alarm generated by clearing the write lock This alert is generated if the write lock parameter is cleared Major revision number of the interoperability test case used in certifying this device as interoperable The format and range are controlled by the Fieldbus Foundation Reserved for use as distributor ID No Foundation enumerations defined at this time This is used to load new licensing into the device The value can be written but will always read back with a value of 0 Indicates which transducer block licensing options are enabled Indicates which function block licensing options are enabled Indicates which diagnostics licensing options are enabled Indicates which miscellaneous licensing options are enabled Major revision of software that the resource block was created with Minor revision of software that the resource block was created with Build of software that the resource block was created with The string contains the following fields Major rev 1 3 characters decimal number 0 255 Minor rev 1 3 characters decimal number 0 255 Build rev 1 3 characters decimal number 0 255 Time of build 8 charac
64. eee Seo Aeon ages a 4 2 Communication Power Check 4 2 Resetting the Configuration RESTART 4 2 TroubleshootiNGivi sevanja AN ARA K A wee 4 3 Foundation Fieldbus 4 3 Resource Block n e Aa E E a Eni 4 3 I O Transducer and Logic Block Troubleshooting 4 3 NAMUR Sensors 4 3 APPENDIX A Specifications lt 5 skis diva s aa ne IS A 1 Reference Data Functional Specifications A 1 Physical Specifications A 4 Function Blocks Specification A 4 Dimensional Drawings A 5 Ordering Information A 7 APPENDIX B Approved Manufacturing Locations B 1 Product Certifications European Directive Information B 1 Hazardous Locations Certificates B 1 North American Approvals B 1 European Approvals B 2 APPENDIX C Resource Block Parameters C 1 Function Blocks I O Transducer Parameters C 5 Logic Transducer Parameters C 8 Discrete Input Block
65. equires just one argument NOT Performs the logical inversion of the argument function Limits on Functions There is no limit to the number of functions described above as long as they fit within the 20 equations described by 80 character strings The following functions are limited to 10 of each within the entire set of 20 equations This is because the functions require memory to store constants or last values The size of amemory element is 16 bits so the maximum size of a constant value is 65535 There are no signed numbers Edge Detection Functions RISE This function evaluates as false unless the previous value of the argument was false and now the argument evaluates to true This function is true for only one equation evaluation cycle It will always be false on the following cycle FALL This function evaluates as false unless the previous value of the argument was true and now the argument evaluates to false This function is true for only one equation evaluation cycle It will always be false on the following cycle Clock Function NOTE All arguments of time are in tenths of a second CLOCK onTime off Time The parameters onTime and offTime are constants This function does not take other functions CLOCK runs unconditionally with a period determined by onTime plus offTime Time is specified in tenths of a second The function will be true for onTime tenths of a second On the first evaluation cycle a
66. er an H1 fieldbus to a DO block in the 848L This is the equivalent of a toggle switch so the 848L logic breaks it up into start and stop signals A pulse timer is required to extend the rise of the DCS Run signal until the confirm contact can pull in An operator will hold the start button in until something happens The DCS logic needs to know when the HOA switch is in the Auto position and also the state of the auxiliary contact so DI blocks are configured for them The ladder diagram looks like this DO1 5 JE bre Sele aaa AA AA o t EQ1 1 3 4 Outl a este S 4 gt HPA t OUTI EQ 5 2 DO1 T beth eee ije aaa pore 5 First instantiate two DI blocks and a DO block Set the DO channel to 9 Set the Auto DI channel to 2 and the Contactor DI channel to 5 Use appropriate configuration for the other data in the blocks such as Tag Rung T is equation 1 This is necessary because the Out1 equation has 70 characters not because it is needed in two or more equations The expression is TP AND RISE DO 1 NOT IN 5 30 Rung Out1 is output equation 1 The first expression and the second are basic motor control expressions with an additional selector contact The expression is OR AND IN 1 IN 3 OR IN 4 IN 5 AND IN 2 DO 1 OR EQ 4 IN 5 To test this use the usual buttons and relay along with a selector switch and manual operation of the
67. er becomes read only and will reflect the state of the hardware switch In order to enable the software write lock the SW_SEL bit must be set in the FEATURE_SEL parameter Once this bit is set the WRITE_LOCK parameter may be set to Locked or Not Locked Once the WRITE_LOCK parameter is set to Locked by either the software or the hardware lock all user requested writes as determined by the DEFINE WRITE LOCK parameter shall be rejected The DEFINE_WRITE_LOCK parameter allows the user to configure whether the write lock functions both software and hardware will control writing to all blocks or only to the resource and transducer blocks Internally updated data such as process variables and diagnostics will not be restricted by the security switch The following table displays all possible configurations of the WRITE_LOCK parameter FEATURE_SEL FEATURE_SEL WRITE_LOCK Write access HW_SEL bit SW_SEL bit SECURITY SWITCH WRITE LOCK Read Write DEFINE WRITE LOCK to blocks 0 off 0 off 1 unlocked Read only NA All 0 off 1 on NA 1 unlocked Read Write NA All 0 off 1 on NA 2 locked Read Write Physical Function Blocks only 0 off 1 on NA 2 locked Read Write Everything None 1 on 0 off 0 unlocked 1 unlocked Read only NA All 1 on 0 off 1 locked 2 locked Read only Physical Function Blocks only 1 on 0 off 1 locked 2 locked Read only Everything None 1 The hardware and software writ
68. ference Manual 00809 0100 4696 Rev AA September 2004 F 8 Reference Manual 00809 0100 4696 Rev AA 9 17 04 Rosemount 848L Index Numerics B E 2 Inch Pipe Stand Boolean Expressions Error Handling Mounting 2 3 Valve Control F 3 Logic Equation Syntax D 4 European Directive B 1 A c Execution Times 3 4 ADVISE ACTIVE 3 8 Cable Glands ADVISE ALM 3 8 Installation 2 9 F ADVISE ENABLED 3 7 Capabilities 3 4 FAILED ACTIVE alarms 3 6 ADVISE MASK 3 7 Block Execution Times 3 4 FAILED ALARMS 3 6 ADVISE PRI 3 7 Host Timer 3 4 FAILED ACTIVE 3 6 Advisory Alarms 3 7 VORS ade tad ind 3 4 FAILED_ALM 3 6 ADVISE ACTIVE 3 8 Changing Modes 3 2 FAILED ENABLED 3 6 ADVISE ALM 3 8 Commissioning 4 2 FAILED MASK 3 6 ADVISE MASK 3 7 TAQ A MR ENA 2 8 FAILED PRI 3 6 ADVISE PRI 3 7 Conduit Entries 2 10 FAILED ALM 3 6 Alarms Configuration FAILED_ENABLED alarms 3 6 ADVISE ACTIVE 3 8 Alarms 0 3 9 FAILED MASK alarms 3 6 ADVISE ALM 3 8 Reset na bate NG 4 2 FAILED PRI alarms 3 6 ADVISE MASKParameter
69. fter the device starts up the onTime interval will start because all of the dynamic values are zero Use the NOT function to invert this behavior and swap the on and off times Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Counter Functions CTU clock reset target The parameters clock and reset are functions The target is a 16 bit constant Whenever reset is true the internal counter is set to zero and the value of the function is false The value of clock is ignored while reset is true If reset is false the internal counter will increment once for each rise of the clock parameter When the internal counter equals the target value the value of the function is true and the counter stops counting in order to avoid rollover The value of the function is false if the internal counter does not equal the target The internal counter is not visible from Fieldbus and is not available to any other function The value of the internal counter is not retained during a device restart This function is not suitable for a totalizer but can be used as a prescaler to adjust the external mechanical counter rate The pulse rate must be less than five per second The following expression increments the counter whenever hardware input 1 turns on The counter is reset whenever hardware input 2 is on If input one is from a mechanical displacement flowmeter that delivers 76 54 pulses per gallon then the highest flow rate i
70. he confirm contact closes EQ1 becomes true and breaks the start circuit but the confirm contact has closed and the motor stays running Each rung requires a separate equation in the 848L so that the execution order can be preserved Note that the output equations are always executed last so it is good practice to arrange the ladder diagram in execution order Rung T is equation 1 It generates a 60 minute pulse when the confirm contact is true e The expression is TP IN 3 36000 For rung Out1 the expression is basic motor control with input 2 in series with T e The expression is AND IN 1 OR AND IN 2 NOT EQ 1 IN 3 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Maximum Restarts A large motor is too expensive to replace if it burns up because the operator wanted to give it another try when in fact the pump was jammed The life of the contactor is also shortened when it has to interrupt locked rotor current In this case it is normally possible for the motor to clear the jam on the second or third try A counter limits the number of starts to 3 for example within a preset time since the first attempt Notice that C1 in EQ1 and T2 in EQ2 are forward references that cannot have a bad status A Bad status at channel 2 the start button will propagate to all of the equations and make the output Bad A bad stop button or confirm contact will only make the output Bad The I O transducer block para
71. he value of the function will become false after the target amount of time has elapsed This condition persists as long as power is false The following equation keeps the outlet valve open for about 5 seconds after the pump is shut off so that the pressure across the pump can equalize Hardware output 1 runs the pump and hardware output 2 opens the valve OUT1_EQ contains lt something that controls the pump gt OUT2_EQ contains TOF OUT 1 50 3 17 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 3 18 TP power target Whenever power transitions from false to true the value of the internal timer is set to the target and the value of the function is true The value of the function will become false after the target amount of time has elapsed This function is similar to TOF except that a timing cycle is only initiated by the rise of power Power may go false or stay true without affecting the timing cycle The cycle is restarted anytime that power goes true after the function has had at least one evaluation cycle as false Latching Functions A latch is a two state device that can be set to true or reset to false It will retain its state when both commands are false It will not retain its state through a device restart The initial state is Reset Two latch functions are required to define the behavior when both commands are true depending on which state should be dominant The result of the func
72. ion allowed before PWA_SIMULATE can be active Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L O TRANSDUCER PARAMETERS Table C 2 I O Transducer Parameters Numbe r Parameter Description 1 ST_ REV The revision level of the static data associated with the function block 2 TAG_ DESC The user description of the intended application of the block 3 STRATEGY The strategy field can be used to identify grouping of blocks 4 ALERT_ KEY The identification number of the plant unit 5 MODE_ BLK The actual target permitted and normal modes of the block For further description see the Mode parameter formal model in FF 890 6 BLOCK_ERR This parameter reflects the error status associated with the hardware or software components associated with a block Multiple errors may be shown For a list of enumeration values see FF 890 Block_ Err formal model 7 UPDATE EVT This alert is generated by any change to the static data 8 BLOCK ALM The block alarm is used for all configuration hardware connection failure or system problems in the block The cause of the alert is entered in the subcode field The first alert to become active will set the Active status in the Status attribute As soon as the Unreported status is cleared by the alert reporting task another block alert may be reported without clearing the Active status if the subcode has changed 9 TRANSDUCER A directory that specifies the number and starting indices of the
73. ions will then be evaluated and the status of the evaluation shown in the parameter PARSE RESULT If any errors were found the block will remain in the OOS mode Status Propagation The contact and Boolean value has a binary value and a good bad status A status is applied to a channel value in one of the following ways The hardware input device maybe able to tell if it is shorted or open in addition to on or off If the hardware cannot tell then the status is always good unless a device failure prevents reading the I O data The evaluation of an equation propagates either Good Non cascade or Bad both Non specific Each function that is evaluated determines both a value and a status of either good or bad The functions that provide status are the functions that test a channel number IN ICF ICR OUT DO PS and EQ If any of the function s parameters have a Bad or Uncertain status with any sub status then the function terminates and returns a bad status otherwise it returns a good value and status When an equation set of functions is evaluated if a function returns a bad status then evaluation of that equation stops and the equation channel status is set to Bad Non specific If evaluation goes to completion the channel status will be set to Good Process Non specific not limited Status propagates forward in the direction of the last output equation If a function references an equation that is the equation being evaluated o
74. is filter value will be ignored by the device When the device detects a failure OUT1 will be set to this value An identifier associated with discrete output 2 The value and status of discrete Output 2 The transducer type of discrete sensor 10 Any state change that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure OUT2 will be set to this value Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table C 2 l O Transducer Parameters Numbe r 57 58 59 59 59 60 61 62 62 62 63 64 65 66 67 68 69 Parameter OUT 3 TAG OUT3 OUT 3 CONFIGIO TYPE OUT 3 CONFIGFILTER OUT 3 CONFIGFAIL S AFE OUT 4 TAG OUT4 OUT_4_ CONFIGIO TYPE OUT 4 CONFIG FILTER OUT 4 CONFIGFAIL SAFE BODY TEMP lO SOFT REV CLEAR COUNTS DETAILED STATUS MACRO IN LATCH MACRO EO LATCH MACRO OUT LATCH Description An identifier associated with discrete output 3 The value and status of discrete Output 3 The transducer type of discrete sensor 11 Any state change that lasts for a duration less than this filter value will be ignored by the device When the device detects a failure OUT3 will be set to this value An identifier associated with discrete output 4 The value and status of discrete Output 4 The transducer type of discrete sensor 12 Any state change that lasts for a duration less than this filte
75. ive of the apparatus cable gland or blanking plug The apparatus is not capable of withstanding the 500V insulation test required by Clause 9 4 of EN 50021 1999 or Clause 8 1 of EN 60079 2003 This must be taken into account when installing the apparatus Component approved EEx e cable entries must be used so as to maintain the ingress protection of the enclosure to at least IP54 Any unused cable entry holes must be filled with component approved EEx e blanking plugs CENELEC Type n Component Certification Number Baseefa04ATEX0026U ATEX Marking 113 G EEx nA nL IIC T4 Tamp 40 C to 50 C CE Special Conditions for Safe Use x 1 ND The component must be installed in a suitable certified enclosure capable of withstanding an impact of 7 0J The apparatus is not capable of withstanding the 500V insulation test required by Clause 9 4 of EN 50021 1999 or Clause 8 1 of EN 60079 2003 This must be taken into account when installing the apparatus CENELEC Dust Ignition Proof Certification Number Baseefa04ATEX0028X ATEX Marking II 1D T90 C Tamp 20 C to 65 C CE 1180 Special Conditions for Safe Use x 1 Component approved EEx e cable entries must be used so as to maintain the ingress protection of the enclosure to at least IP66 Any unused cable entry hole must be filled with component approved EEx e blanking plugs The ambient temperature range of use shall be the most restrictive of th
76. k To do this configure MODE_BLOCK PERMITTED to allow only the desired operating modes It is recommended to always select OOS as one of the permitted modes Types of Modes For the procedures described in this manual it will be helpful to understand the following modes AUTO The functions performed by the block will execute If the block has any outputs these will continue to update This is typically the normal operating mode Out of Service OOS The functions performed by the block will not execute If the block has any outputs these will typically not update and the status of any values passed to downstream blocks will be BAD To make some changes to the configuration of the block change the mode of the block to OOS When the changes are complete change the mode back to AUTO MAN In this mode variables that are passed out of the block can be manually set for testing or override purposes Other Types of Modes Other types of modes are Cas RCas ROut IMan and LO Some of these may be supported by different function blocks in the Rosemount 848L For more information see the Function Block manual document 00809 0100 4783 NOTE When an upstream block is set to OOS this will impact the output status of all downstream blocks The figure below depicts the hierarchy of blocks Resource Transducer Discrete Input Other Block gt Block DIBlock gt pie ocks
77. ke an equation more readable but counts as a character The following characters are specifically not allowed in a logic The period dot character is not allowed There are no decimal numbers The unary minus character is not allowed There are no negative integers The math operators are not allowed nor are symbols for any logic operators amp lt gt Functions must be from the list of Logic Functions below and must have the specified number of parameters Channel Functions The following functions read channel value and status The number of instances of these functions is unlimited except for PS A channel value and status is set by the I O processor at the beginning of an equation evaluation cycle by the equations as they complete evaluation or by macrocycle evaluations of any DO blocks attached to channels 9 through 16 The status of channels 9 16 is always good even if the DO block has a bad status IN The input hardware sets the values of channels 1 8 Configured DI blocks may specify these channels in order to read the specified hardware input The value of an input may be referenced in an equation by the IN i function where the channel number is placed between the parentheses The range of is 1 to 8 Multiple references to any channel are allowed ICR ICF I O samples are taken every millisecond which is considerably faster than equation executions It is possibl
78. lose There is no bump going through Auto because the command is either Open or Close Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Boolean Expressions Basic Valve Control Double Block and Bleed If the valve absolutely must not leak into the process then two valves are put in series and the short pipe between them is vented bled to an appropriate place The bleed valve must be shut before the main valves can be opened and the main valves must both be closed before the bleed valve can be opened Motorized Valve The actuator is a reversible motor that turns a lead screw that moves the valve stem Two confirms are required because the motor is only free to turn while the valve stem is travelling Outputs are required for the Forward and Reverse motor directions If a big motor driven valve takes a minute to change position that s a long time to find out that it didn t move The crack time is a period of time in which the previously closed contact must open to confirm that the actuator is moving and the valve is not stuck or powerless Heat Exchange Medium Selection Batch heat exchangers have to use different media to heat and cool If the media are compatible like steam and chilled water then a simple four valve manifold can handle the selection The four valves are independent because it is necessary to drain one medium from the exchanger before using the other There are many variations on
79. mber 2004 Rosemount 848L Figure 3 1 848L Logic Transmitter Data Flow ana IN 1 DI Channel Any IN IN_2 Any EQ Any OUT IN 3 DI Block OUT 8 Packed INs Hardware INA First 8 Packed EQs Inputs INS Last 8 Packed EQs 4 Packed OUTs ING IN 7 MDI Channels QUT 1 ALL INS ING First EQs MDI Block i Last EOs 8 Inputs H All OUTs H OUT 8 DO 1 DO 2 DO 3 DO Channel Any DO DO 4 zo DO Block IN DO 5 8 Packed DOs DO 6 DO 7 DO 8 EQ1 gt rN 1 MDO Channel MDO Block 1 All DOs 8 Outputs H N16 Logic Equations INS L l H EQ 16 S OUT 1 Hardware Es N 4 Output Outputs ovT 3 Equations OUT 4 Sensor Transducer Block Sensor amp Output Configuration 3 11 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 3 12 The following characters are allowed in a logic equation Uppercase and lowercase alphabet case insensitive used to specify functions e Digits 0 9 used to specify channel numbers and unsigned integer constants Comma used to separate parameters in a function parameter list e Parentheses used to define the extent of the parameter list of a function e Semicolon used to terminate an equation Space not tab ignored by parser may be used to ma
80. meter OUT_1_CONFIG FAIL_SAFE defaults to Fail False which will stop the motor on any bad input status or it may be set to Fail Last Good which will not allow the stop button to turn it off You probably don t want to uses input devices with status for this application 2 Cl TI a a233 WA Ses SSeS ANA r EQ1 TI t C a SS SS o AR Count j se brt EQ2 T2 Gawd eS SS Sea SSeS Reset C T2 HSS N EQ3 1 TI Outl pesi PERE See See aa OUT1_EQ 3 Rung T1 is equation 1 The pulse time must be set to the allowable on time for the locked rotor condition to prevent tripping the overloads in this case 2 5 seconds The expression is TP AND IN 2 NOT EQ 2 25 Rung C is equation 2 which counts the attempts to start and holds at the count until the 30 minute timer expires e The expression is CTU RISE EQ 1 EQ 5 3 Rung T2 is equation 3 the 30 minute timer The expression is TON EQ 2 18000 Rung Out1 is output equation 1 The expression is AND IN 1 OR EQ 1 IN 3 E 7 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Winding Temperature E 8 The multi rung delay mechanism above may be replaced if the motor has a winding temperature sensor and a convertor that opens a contact when the motor is too hot and closes when it is sufficiently cool The following drawing applies such a contact as input 4 to the
81. mmunicate or provides an erratic output check for adequate voltage to the transmitter The transmitter requires between 9 0 and 32 0 VDC at the bus terminals to operate with complete functionality Check for wire shorts open circuits and multiple grounds There are two types of restarts available in the Resource Block The following section outlines the usage for each of these Restart Processor cycling Performing a Restart Processor has the same effect as removing power from the device and reapplying power Restart with Defaults Performing a Restart with Defaults resets the static parameters for all of the blocks to their initial state This is commonly used to change the configuration and or control strategy of the device including any custom configurations done at the Rosemount factory Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L TROUBLESHOOTING FOUNDATION Fieldbus Symptom Device does not show up in the live list Device that is acting as a LAS does not send out CD All devices go off live list and then return Resource Block Symptom Mode will not leave OOS Block Alarms Will not work Possible Cause Network configuration parameters are incorrect Corrective Action Set the network parameters of the LAS host system according to the FF Communications Profile ST 8 MRD 10 DLPDU PhLO 4 MID 7 TSC 4 1 ms T1 1920000 60 s T2 5760000 180 s T3
82. n for the resource Manufacturer identification number used by an interface device to locate the DD file for the resource Manufacturer s model number associated with the resource used by interface devices to locate the DD file for the resource Manufacturer revision number associated with the resource used by an interface device to locate the DD file for the resource Revision of the DD associated with the resource used by the interface device to locate the DD file for the resource Options for controlling access of host computer and local control panels to operating tuning and alarm parameters of the block The types of hardware available as channel numbers The supported hardware type is SCALAR_ INPUT Allows a manual restart to be initiated Used to show supported resource block options The supported features are SOFT WRITE LOCK SUPPORT HARD WRITE LOCK SUPPORT REPORTS and UNICODE Used to select resource block options Identifies the block execution methods available for this resource The supported cycle types are SCHEDULED and COMPLETION OF BLOCK EXECUTION Used to select the block execution method for this resource Time duration of the shortest cycle interval of which the resource is capable PARAMETERS Table C 1 Resource Block Parameters Number Parameter 1 ST_REV 2 TAG_ DESC 3 STRATEGY 4 ALERT_ KEY 5 MODE_ BLK 6 BLOCK_ERR 7 RS_ STATE 8 TEST_RW 9 DD_ RESOURCE 10 MANUFAC_ ID 11 DEV_ TYPE 12 DEV REV 13
83. n is disabled and will not be detected Mask of ADVISE_ ALM Corresponds bit for bit to ADVISE_ ACTIVE A bit on means that the condition is masked out from alarming Enumerated list of advisory conditions within a device Alarm indicating advisory alarms These conditions do not have a direct impact on the process or device integrity Parameter representing the overall health of the device 100 being perfect and 1 being non functioning The value will be set based on the active PWA alarms in accordance with the requirements stated in Device Alerts and Health Index PlantWeb Implementation Rules Each device may implement its own unique mapping between the PWA parameters and HEALTH_ INDEX although a default mapping will be available based on the following rules HEALTH_ INDEX will be set based on the highest priority PWA _ ACTIVE bit as follows FAILED_ ACTIVE 0 to 31 HEALTH_ INDEX 10 MAINT_ ACTIVE 27 to 31 HEALTH_ INDEX 20 MAINT_ ACTIVE 22 to 26 HEALTH_ INDEX 30 MAINT_ ACTIVE 16 to 21 HEALTH_ INDEX 40 MAINT_ ACTIVE 10 to 15 HEALTH_ INDEX 50 MAINT_ ACTIVE 5 to 9 HEALTH_ INDEX 60 MAINT_ ACTIVE 0 to 4 HEALTH_ INDEX 70 ADVISE_ ACTIVE 16 to 31 HEALTH_ INDEX 80 ADVISE_ ACTIVE 0 to 15 HEALTH_ INDEX 90 NONE HEALTH_ INDEX 100 Allows direct writes to the PlantWeb Alert ACTIVE parameters and RB DETAILED_STATUS The simulate switch must be ON and the SIMULATE_STATE must be Switch on simulat
84. nction s value will be true for 1 execution cycle each time the requested device input has had divisor pulses This is ideal for a scaling fast pulse inputs to a rate suitable for the logic execution cycle RISE 1 1 RISE a 10 This function is a rising edge trigger When a transitions from false to true this function s result is true otherwise it is false RS 2 2 RS set reset 10 This function is a reset dominant latch When reset is true this function will reset its state to false regardless of the value of set When reset is false the function s state will have a false value until set has had at least 1 true reading after which the state will remain true The result of this function is the function s state SHL 3 4 SHL a clock reset bit 10 This function is an 8 bit left shift register When clock transitions from false to true the value of a is shifted into the least significant bit of this function s register The remaining bits are shifted left by 1 bit position When reset is true all 8 bits in this function s register will be cleared to zero reset is an optional parameter and will always be considered false if it is not present The result of this function is the value of bit number bit in the register SHR 3 4 SHR a clock reset bit 10 This function is an 8 bit right shift register When clock transitions from false to true the value of a is shifted into the most significant bit of
85. nction s output will remain false for time 100 milliseconds before going true 2 TP a time This function is a pulse timer When a transitions to true this function will set its output to true for time 100 milliseconds and then return false 10 XOR a b NO LIMIT This function is false if all parameters are in the same state either all true or all false Otherwise the function is true The syntax of the entered eguation is parsed when the target mode transitions from OOS to AUTO Each eguation is checked in order and when an error is encountered in an eguation the parsing is suspended for the remaining equations and the target mode is set back to OOS The equation where the problem was encountered is indicated along with a message as shown in the table below Bounds checking on the values of parameters used in the functions are checked during run time when ACTUAL MODE is AUTO Errors of this type will be indicated by a bad status in the eguations computed value Table D 2 Error Handling Conditions Status response No semi colon appears in the eguation More left parenthesis than right parenthesis More right parenthesis than left parenthesis A comma placed without a preceding function parameter Open and Closed parenthesis without a parameter or statement contained A semicolon is contained prior to finishing an expression A function call is missing one or more parameters A bad cha
86. nd 2 3 Physical on cag ane rer ppa DIN Rail Without an Enclosure 2 2 Specifications A 4 Maka ba of Ee A 7 Panel with a Junction Box 2 2 PlantWeb Alarms 3 6 3 8 Using Cable Glands 2 9 3 A Usina Conduit Entri 2 10 Multiple Discrete Input Blocks C 12 AdVISO VE ba Rives 3 7 i PaA ae a a spreji zg CB FAILED ALARMS 3 6 EES ON BIDON kamara aa ee 7 Multiple Discrete Output Blocks C 13 MAINT ALARMS 3 7 Parameters C 14 i tion B R TM ost Ox DY N Recommended Actions 3 8 a Tae e AA Network Parameters 3 4 PlantWeb Alarms 3 8 RECOMMENDED ACTION 3 8 L O Reports comino ia Pid 3 4 LIM_NOTIFY 3 5 Resource Block 3 4 eee Operation 3 1 Link Active Scheduler 3 3 Orderhalhiarmaton A 7 Configuration 3 4 Logic Equation Syntax D 1 DEA ai FEATURES FEATURES_SEL 3 4 Overview 1 2 Error Handling D 4 Parameters C 1 A Manual 1 2 Logic Transducer Transmitter 4 2 Troubleshooting 4 3 Parameters CBr eae ONS TAG Return of Materials 1 3 M a S MAINT_ACTIVE 3 7 ADVISE ACTIVE 3 8 SE U aaa ceo ml kata zle 3 5 MAINT ALARMS 3 7 oe Ja a Security Switch 2 6 ADVISE ALM 3 8 MAINT
87. nds 9 X M20 nickel plated brass glands for 7 5 11 9 mm unarmored cable JP3 Plastic Junction Box Conduit Entries 5 Plugged Holes suitable for installing 2 in NPT fittings JA1 Aluminum Junction Box No Entries JA2 Aluminum Cable Glands 9 X M20 nickel plated brass glands for 7 5 11 9 mm unarmored cable JA3 Aluminum Conduit Entries 5 Plugged Holes suitable for installing 1 2 in NPT fittings JS1 Stainless Steel Junction Box No Entries JS2 SST Box Cable Glands 9 X M20 nickel plated brass glands for 7 5 11 9 mm unarmored cable JS3 Stainless Steel Box Conduit Entries 5 Plugged Holes suitable for installing 2 in NPT fittings Conduit Electrical Connector GE M12 4 pin Male Connector eurofast GM A size Mini 4 pin Male Connector minifast Software Options CT Disable Local Logic Function Typical Model Number 848L F A NA S001 T1 JP1 1 The Rosemount 848L ordered with option code NC is not approved as a stand alone unit Additional system certification is required 2 Not available with certain hazardous location certifications Contact a Rosemount representative for details A 7 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 A 8 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Appendix B APPROVED MANUFACTURING LOCATIONS EUROPEAN DIRECTIVE INFORMATION HAZARDOUS LOCATIONS CERTIFICATES North American Approvals ROSEMOUNT P
88. ocess Management Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemou nt 848L Table of Contents SECTION 1 A A ate On cae alee Kan 1 1 Introduction WaminGS c a ie ek ited Pie eats ee DB Been he 1 1 OVERVIEW a AA fee alias te te AS E 1 2 Transmitter sc iii z eee ian NINA oye A ba oe A A 1 2 Manual et NG NG NGA NE RN eni S Ria AE Ode ANN Am 1 2 Return of Materials 1 3 SECTION 2 Safety Messages Na hati CLA na coh aa Dd tat 2 1 Installation WalmminGS ts cc eve en a Shae aaa 2 1 MOUNTING aa aa pa Galton aah eee EP di zel ete hse oa als 2 1 Mounting to a DIN Rail Without an Enclosure 2 2 Mounting to a Panel with a Junction Box 2 2 Mounting to a 2 Inch Pipe Stand 2 3 WINING a AR AA EN S aed 2 4 Power Supply Connections 2 4 Surges Transients sni et Nabahala bel ie area bee k zo 2 5 Ciela 2 5 SWITCHES AA Man Dt ie el 2 5 IGAN LG AA o end Oo athe deo SE dn oie ei 2 7 TAGGING hid SA A eS RS MONAT MA dei do alo bem 2 8 Transmitter Label 2 9 Installations 4 0b nk z poje O e Dade ANA lede du 2 9 Using Cable Glands 2 9 Using Conduit Entries 2 10 SECTION 3 Overviews Zi uct yes Po AA a 3 1 Configuration Safety Messages NE nl Ka een Nr ele une eat sk 3 1
89. ocks Time duration at which to give up on computer writes to function block RCas locations Shed from RCas will never happen when SHED RCAS 0 Time duration at which to give up on computer writes to function block ROut locations Shed from ROut will never happen when SHED_ ROUT 0 Condition set by loss of communication to an output block fault promoted to an output block or physical contact When FAULT STATE condition is set then output function blocks will perform their FAULT _ STATE actions Allows the FAULT_ STATE condition to be manually initiated by selecting Set Writing a Clear to this parameter will clear the device FAULT_ STATE if the field condition has cleared Maximum number of unconfirmed notify messages possible Maximum number of unconfirmed alert notify messages allowed The time the resource will wait for confirmation of receipt of a report before trying again Retry will not happen when CONFIRM_ TIME 0 If set no writes from anywhere are allowed except to clear WRITE LOCK Block inputs will continue to be updated This alert is generated by any change to the static data The BLOCK_ ALM is used for all configuration hardware connection failure or system problems in the block The cause of the alert is entered in the subcode field The first alert to become active will set the Active status in the Status attribute As soon as the Unreported status is cleared by the alert reporting task another block alert may b
90. oid The same thing happens if an overload trip opens the circuit to the solenoid When the overload is reset no power will be applied to the solenoid until the start button is pushed nena CN Over _ STOP N START load M ESQ OD a FSO QRT 0 0 4 Contactor M M ly T Interlock There may be a process condition where it is not safe to run the motor If this condition can be detected and transformed into the change of state of a contact then the normally closed contact may be inserted in series with the control voltage If the interlocked condition occurs then the motor will not run or start An example is a low level condition in a tank feeding the suction of a pump The pump will be damaged if the suction goes dry so a low level switch is put in series with the control voltage for the pump s motor starter Permissive There may be a process condition that is required to be present when a motor is started but is not required once the motor is running A contact that is closed when the permissive condition is true is placed in series with the start button An example is auxiliary lubrication for a large motor that is required to flood the bearing housings to prevent contact between the motor shaft and the bearing material not ball bearings Once the motor is turning lubrication is maintained by shaft rotation and the auxiliary pump can be shut off Emergency Shutdown A process may hav
91. ontrol voltage may be called a coil as in relay coil A group of motor starters may be called a Motor Control Center MCC EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 VARIATIONS ON MOTOR CONTROL E 2 The contactor is never controlled with a toggle switch because that would leave one side of the solenoid electrically hot when the motor overload trips Standard procedure calls for start and stop push buttons in combination with an auxiliary contact on the contactor This contact closes when the solenoid is energized and the motor contacts close The auxiliary contact is rated for the control voltage and current and is far away from the high voltage motor contacts The stop button is normally closed and is in series with the control power The start button is normally open and is also in series with the control power The auxiliary contact is normally open and in parallel with the start button When the start button is pushed the solenoid is powered and the motor and auxiliary contacts eventually close The start button can be released and control power will continue to flow in the auxiliary contact Two things can stop the motor Pressing the stop button removes power to the solenoid causing the auxiliary contact to eventually open along with the motor power contacts The stop button can then be released because there is no complete circuit to the solen
92. polarity sensitive and must be connected correctly to avoid damage to the transmitter See Figure 2 4 on page 2 5 Replace the junction box cover and securely tighten all cover screws 1 0 ii J Enclosure Cover Screw Power Signal Conduit 848_848A09A Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Section 3 OVERVIEW SAFETY MESSAGES Warnings ROSEMOUNT Configuration OVEIVICW o eee it A GN page 3 1 Safety Messages page 3 1 General Block Information page 3 2 Resource Block page 3 4 VO Transducer Block page 3 9 Logic Transducer Block page 3 10 Discrete Input Blocks page 3 20 Discrete Output Blocks page 3 21 Multiple Discrete Input Block page 3 21 Multiple Discrete Output Block page 3 21 This section covers basic operation software functionality and basic configuration procedures for the Rosemount 848L transmitter with FOUNDATION fieldbus This section is organized by block information For detailed information about the function blocks used in the Rosemount 848L logic transmitter refer to Foundation Fieldbus Block Information on page A 1 and the Foundation Fieldbus Function Block manual 00809 0100 4783 Procedures and inst
93. r serious injury Make sure only qualified personnel perform the installation Electrical shock could cause death or serious injury If the device or sensors are installed in a high voltage environment and a fault condition or installation error occurs high voltage may be present on transmitter leads and terminals Use extreme caution when making contact with the leads and terminals FOUNDATION fieldbus is an all digital serial two way multidrop communication protocol that interconnects devices such as transmitters and valve controllers It is a local area network LAN for instruments that enables basic control and I O to be moved to the field devices The Rosemount 848L uses FOUNDATION fieldbus technology developed and supported by Emerson Process Management and the other members of the independent Fieldbus Foundation EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 000809 0100 4696 Rev AA September 2004 Commissioning Addressing HARDWARE MAINTENANCE Sensor Check Communication Power Check Resetting the Configuration RESTART 4 2 To be able to setup configure and have a device communicate with other devices on a segment a device must be assigned a permanent address Unless requested otherwise it is assigned a temporary address when shipped from the factory If there are two or more devices on a segment with the same address the first device to star
94. r a later equation then the status of that equation will be ignored The function will use the last good value of the referenced equation and call its status Good This prevents forward references to equations that reference this equation from locking both equations into Bad status if either ever sets Bad status During initialization of the logic transducer block before the first execution each equation channel status is set to Bad Non specific constant and the value is set to False 3 19 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 DISCRETE INPUT BLOCKS 3 20 Logic Execution Timing The Logic transducer block reads the hardware inputs processes the equations and drives the outputs on a continuous cycle The cycle time or frequency of execution will vary depending on the number and type of logic functions used in the equations The DI blocks are used to communicate the current value of a contact the state of one of the Boolean equations or the state of an output The DI block chooses the value through the Channel parameter Alternatively the DI block can be configured to pass 8 values in a packed format to the host system DeltaV by using channels 7 to 41 To set the channel number use the following procedure for each DI block 1 Set MODE BLK TARGET to OOS 2 Select the Channel parameter 3 Select the desired channel number 4 Set MODE BLK TARGET to AUTO Channel 1 Input 1 Channel
95. r description of the intended application of the block The strategy field can be used to identify grouping of blocks The identification number of the plant unit The actual target permitted and normal modes of the block Target The mode to go to Actual The mode the block is currently in Permitted Allowed modes that target may take on Normal Most common mode for actual This parameter reflects the error status associated with the hardware or software components associated with a block It is a bit string so that multiple errors may be shown The CHANNEL value is used to select the measurement value Refer to the appropriate device manual for information about the specific channels available in each device You must configure the CHANNEL parameter before you can configure the XD SCALE parameter Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition Discrete output to indicate a selected alarm condition This alert is generated by any change to the static data The block alarm is used for all configuration hardware connection failure or system problems in the block The cause of the alert i
96. r previous values DO Channels 9 16 are zero unless set by configured DO or MDO function blocks This allows a function block link to set the value from a remote function block output or HMI screen switch The values may be referenced in equations by the DO d function The range of d is 1 to 8 To directly drive an output from an external device the Output Equation would reference DO d NOTE The value of DO can change during an evaluation cycle if the macrocycle evaluates the DO block This may require referencing the DO value in a single equation to save its state 3 13 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 3 14 EQ Channels 17 32 are set by the result of an equation specified by up to 80 characters and stored in parameter EQx where x is the equation number The equation results are available as a discrete value and status in parameter EQx_VALUE They may be referenced by the EQ u function The range of u is 1 to 16 These are intended to be intermediate values that are used because the value is used in other equations or because the equation text was too long A configured DI block may use an equation channel range 17 to 36 in order to make the result available to other devices OUT The value will be the same as the requested output Additional Channels The ten channels that are used for connecting multiple in or out function blocks can not be referred to by eq
97. r value will be ignored by the device When the device detects a failure OUT4 will be set to this value The value and status of electronics temperature The string contains the following fields Major rev 1 3 characters decimal number 0 255 Minor rev 1 3 characters decimal number 0 255Build rev 1 3 characters decimal number 0 255 Time of build 8 characters xx xx xx military time Day of week of build 3 characters Sun Mon Month of build 3 characters Jan Feb Day of month of build 1 2 characters decimal number 1 31 Year of build 4 characters decimal Builder 7 characters login name of builder Each bit can be written to in order to reset PULSE COUNT X The bits numbered from 1 LSB to 8 MSB will reset PULSE_ COUNT_ 1 to PULSE_ COUNT_ 8 respectively Indicates the state of the transmitter Allows transitions of transducer block channels to be held in a specified state until the macrocycle reads the value at least once Allows transitions of transducer block channels to be held in a specified state until the macrocycle reads the value at least once Allows transitions of transducer block channels to be held in a specified state until the macrocycle reads the value at least once C 7 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 LOGIC TRANSDUCER PARAMETERS Table C 3 Logic Transducer Parameters and Descriptions Number Parameter Description 1 ST_ REV The revision level of the static data a
98. racter is present or a parameter appears outside of a function call An unknown function is called out An opening parenthesis is located after the closing parenthesis of a function call A function call contains too many parameters A decimal number was found where an integer was expected A function result was used as a function parameter where a literal integer number was expected A function has been used more than the maximum allowed instances All equations were parsed successfully Missing semi colon Un matched Un matched Badly placed comma Empty Badly placed semicolon Too few parameters in function Syntax error Unknown function Badly placed Too many parameters in function Invalid number Invalid parameters in function Insufficient resources Equation completed Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L EXAMPLES Take value of input 1 and put it on output 3 Set OUT3_EQ to IN 1 For every transition in both directions on input 5 send a 200 msec pulse out on output 2 but only if input 2 is low Set OUT2_EQ to AND OR TP IN 5 2 TP NOT IN 5 2 NOT IN 2 Turn on output 1 only after input 8 has gone high 10 times start over counting when input 6 is set high Set OUT1_EQ to CTU IN 8 IN 6 10 D 5 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 D 6 Reference Manual 00809
99. rcuits when either the start button is pressed to set the Run latch or the end of the hour count toggles the selector latch Only the enabled circuit will start The output resets the external timer The expression is TP OR RISE EQ 1 EQ 2 20 Rung Out2 is output equation 2 Power goes to the external timer while either confirm is true but not during reset e The expression is AND OR IN 3 IN 4 NOT OUT 1 Rung Out3 is output equation 3 This is basic motor control with an off delay of 5 seconds to maintain flow The expression is TOF AND EQ 1 NOT EQ 3 OR OUT 1 IN 3 50 Rung Out4 is output equation 4 This is also basic motor control with an off delay The expression is TOF AND EQ 1 EQ 3 OR OUT 1 IN 4 50 E 13 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Redundant Motors Switch on Failure E 14 Again there are redundant pumps There is a pressure switch in the common discharge line If the pressure falls then the other pump is started If the pressure does not recover possibly because a flammable liquid is pouring on the ground from a broken pump housing then the alternate pump is stopped The push button controls are Stop input 1 and Start input 2 An auxiliary contact is required from each starter inputs 3 and 4 The pressure switch is linked into a DO that is true when the pressure is low 3 4 2 t L1 Rel Asses li s
100. rk of one of the Emerson Process Management group of companies All other marks are the property of their respective owners Emerson Process Management Rosemount Inc Rosemount Temperature GmbH Emerson Process Management Asia 8200 Market Boulevard Frankenstrasse 21 Pacific Private Limited Chanhassen MN 55317 USA 63791 Karlstein 1 Pandan Crescent T U S 1 800 999 9307 Germany Singapore 128461 T International 952 906 8888 T 49 6188 992 0 T 65 6777 8211 F 952 949 7001 F 49 6188 992 112 F 65 6777 0947 AP RMT Specialist emersonprocess com www rosemount com IANA TA EMERSON 2004 Rosemount Inc All rights reserved Process Management
101. roduct Certifications Approved Manufacturing Locations page B 1 European Directive Information page B 1 Hazardous Locations Certificates page B 1 Rosemount Inc Chanhassen Minnesota USA Emerson Process Management Asia Pacific Private Limited Singapore Rosemount Temperature GmbH Karlstein Germany The EC declaration of conformity for all applicable European directives for this product can be found on the Rosemount website at www rosemount com A hard copy may be obtained by contacting our local sales office Factory Mutual FM Approvals N5 Nonincendive for Class Division 2 Groups A B C D when installed per Rosemount drawing 00848 1035 Temperature code T4 Tamp 40 C to 60 C Canadian Standards Association CSA Approvals N6 Suitable for Class I Division 2 Groups A B C D when installed per Rosemount drawing 00848 1036 Temperature code T4 Tamb 40 C to 60 C EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 European Approvals B 2 CENELEC Approvals N1 CENELEC Type n Certification Number Baseefa04ATEX0027X ATEX Marking 113 G EEx nA nL IIC T4 Tamb 40 C to 50 C Power Bus Max Supply Voltage 32 0 V CE Special Conditions for Safe Use x 1 NC The ambient temperature range of use shall be the most restrict
102. rosemount com Process Management Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Table D 1 Supported Functions Required number Maximum number Maximum Function Name of parameters of parameters Function Description Instances AND 2 10 AND a b NO LIMIT This function s result will be the logical and of a b CLOCK 2 2 CLOCK onTime offTime 10 This function is a periodic clock The result of this function will be true for onTime 100 milliseconds then false for offTime 100 milliseconds and repeats forever CTU 3 3 CTU clock reset count 20 This function is an UP COUNTER When reset is true this function will set its internal counter to 0 When reset is false this function will increment its internal counter each time clock has a rising edge until the counter reaches count The result of this function will be true when the counter reaches count and false otherwise DO 1 1 DO channel number NO LIMIT This function s result will be the value of the reguested external channel value coming into this device via a DO function block EQ 1 1 EQ channel number NO LIMIT This function s result will be the value of the requested equation result Note The equation values are processed in order from the first equation to the last so if equation 4 asks for equation 20 value the equation 20 value will be the value calculated in the previous run time cycle FALL 1 1 FALL
103. ructions in this section may require special precautions to ensure the safety of the personnel performing the operations Information that raises potential safety issues is indicated by a warning symbol A Refer to the following safety messages before performing an operation preceded by this symbol ZA WARNING Explosions can result in death or serious injury Before connecting a configuration tool in an explosive atmosphere make sure the instruments in the loop are installed in accordance with nonincendive field wiring practices Z WARNING Electrical shock can result in death or serious injury Avoid contact with the leads and terminals High voltage that may be present on leads can cause electrical shock EMERSON www rosemount com Process Management Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 GENERAL BLOCK INFORMATION Modes The Resource Transducer and all function blocks in the device have modes of operation These modes govern the operation of the block Every block supports both automatic AUTO and out of service OOS modes Other modes may also be supported N Changing Modes To change the operating mode set the MODE_BLK TARGET to the desired mode After a short delay the parameter MODE_BLOCK ACTUAL should reflect the mode change if the block is operating properly Permitted Modes It is possible to prevent unauthorized changes to the operating mode of a bloc
104. s 3 5 gallons per minute The following equation will deliver one 0 1 second pulse per 100 gallons OUT1_EQ contains CTU IN 1 0UT 1 7654 Starting at zero 7653 pulses go by and then pulse 7654 turns on the output On the next evaluation cycle the counter is reset because Output 1 is on This is a result of the order of execution of equations Output 1 becomes true because the count is reached but the OUT 1 function has already been evaluated as false The counter must reset before the next pulse comes in The output pulse may be extended with a TP function TON power target Whenever power is false the value of the internal timer is set to zero and the value of the function is false When power is true then the value of the function will become true after the target amount f time has elapsed This condition persists as long as power is true The timer resets when power is false The following equation filters the level switch in a stirred tank so that high level bouncing of the float does not create nuisance alarms for the operator Hardware input 1 senses the level switch and hardware output 1 drives the alarm annunciator with its big horn The level switch must stay closed for 5 minutes before the alarm is energized and the operator is startled by the horn OUT1_EQ contains TON IN 1 3000 TOF power target Whenever power is true the value of the internal timer is set to the target and the value of the function is true T
105. s entered in the subcode field The first alert to become active will set the Active status in the Status parameter As soon as the Unreported status is cleared by the alert reporting task another block alert may be reported without clearing the Active status if the subcode has changed The MDO block makes available to the I O subsystem its eight input parameters IN D1 8 This function block keeps the fault state features specified for the DO block It includes option to hold the last value or a preset value when in Fault State individual preset values for each point and a delay time to go into the Fault State The actual mode will be LO only due to the resource block SET FSTATE parameter If an input parameter has a bad status that parameter will be in Fault State but the mode calculation of the block will not be affected The parameter FSTATE STATUS shows that points are in Fault State The MDO block does not support back calculation or the Cas mode Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Table C 7 Parameters and Description IN D1 IN D2 IN D3 IN D4 IN D5 IN D6 IN D7 IN D8 1 ANOa RON 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 BLOCK ALGORITHM OUTPUT SNAP OF TRANSDUCER BLOCK INPUTS ST REV TAG DESC STRATEGY ALERT KEY MODE BLK BLOCK ERR CHANNEL IN D1 IN D2 IN D3 IN D4 IN D5 IN D6 IN D7 IN D
106. s indicated by a warning symbol A Please refer to the following safety messages before performing an operation preceded by this symbol Failure to follow these installation guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Electrical shock could cause death or serious injury If the device or senors are installed in a high voltage environment and a fault condition or installation error occurs high voltage may be present on transmitter leads and terminals Use extreme caution when making contact with the leads and terminals EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 OVERVIEW Transmitter Manual The 848L provides a cost effective field mounted interface for discrete inputs and outputs on a Foundation Fieldbus H1 network The 848L allows you to leverage the fieldbus network to reduce discrete input and output wiring and eliminate the need for a separate bus for discrete inputs and outputs The 848L can communicate with other devices on the segment to provide logic interactions independent of any upper level controller The 848L also has logic capability allowing it to independently control outputs based on the state of one or more of it s inputs or discrete signals from other devices on the network A Logic Block allows for up to 20 Boolean equations 8 Inputs and 4 Ou
107. ssociated with the function block 2 TAG_ DESC The user description of the intended application of the block 3 STRATEGY The strategy field can be used to identify grouping of blocks 4 ALERT_ KEY The identification number of the plant unit 5 MODE_ BLK The actual target permitted and normal modes of the block For further description see the Mode parameter formal model in FF 890 6 BLOCK_ERR This parameter reflects the error status associated with the hardware or software components associated with a block Multiple errors may be shown For a list of enumeration values see FF 890 Block_ Err formal model 7 UPDATE EVT This alert is generated by any change to the static data 8 BLOCK ALM The block alarm is used for all configuration hardware connection failure or system problems in the block The cause of the alert is entered in the subcode field The first alert to become active will set the Active status in the Status attribute As soon as the Unreported status is cleared by the alert reporting task another block alert may be reported without clearing the Active status if the subcode has changed 9 TRANSDUCER A directory that specifies the number and starting indices of the transducers in the transducer block For DIRECTORY further information please refer to the Transducer Block Application Process Part 1 FF 902 specification 10 TRANSDUCER Identifies the transducer that follows TYPE 11 XD ERROR One of the error codes defined in
108. sult of computing EQ14 48 EQ15_ VALUE The value and status of the result of computing EQ15 49 EQ16_ VALUE The value and status of the result of computing EQ16 50 OUT1_ VALUE The value and status of the result of computing OUT1_ EQ 51 OUT2_ VALUE The value and status of the result of computing OUT2_ EQ 52 OUT3_ VALUE The value and status of the result of computing OUT3_ EQ 53 OUT4_ VALUE The value and status of the result of computing OUT4_ EQ 54 DO1_ VALUE The value and status of value coming from channel DO1 55 DO2_ VALUE The value and status of value coming from channel DO2 56 DO3_ VALUE The value and status of value coming from channel DO3 57 DO4_ VALUE The value and status of value coming from channel DO4 58 DO5_ VALUE The value and status of value coming from channel DO5 59 DO6_ VALUE The value and status of value coming from channel DO6 60 DO7_ VALUE The value and status of value coming from channel DO7 61 DO8_ VALUE The value and status of value coming from channel DO8 62 DETAILED _ Indicates the state of the transmitter STATUS DISCRETE INPUT The DI takes the manufacturer s discrete input data selected by channel BLOCK number and makes it available to other function blocks as its output The output will have a value of either true or false along with the status of the output A custom feature of the DI block in the 848L is the ability to pack 8 status bits into the single output of a DI block This is accomplished by selecting
109. t then the normally closed contact may be inserted in series with the control output If the interlocked condition occurs then the valve will close if open or stay closed An example is the drain valve of a batch reactor which may have two interlocks One prevents opening the drain if any feed valve is open The other will not let material in the reactor drain into a tank that isn t ready for it Permissive There may be a process condition that is reguired to be present when a valve is opened but is not reguired once it has been opened A contact that is closed when the permissive condition is true is placed in series with the open command A latch is required because the permissive may go false after the valve is opened One application for a permissive involves a gas storage tank The pressure must be above a certain amount to allow the valve to be opened but once opened the pressure will fall below the permissive level Open Auto Close An operator may be required to perform some function near the valve such as unplugging a pipe or locally directing material flow The valve is normally controlled by the central system but must have a local station to allow the local operator to control it The local station has a three position switch for Open Auto Close selection The control room has control when the switch is in the Auto position If the switch is turned to Open then the valve will open possibly bypassing interlocks and the same for C
110. t 848L Below is a list of the FEATURES the Rosemount 848L supports UNICODE All configurable string variables in the Rosemount 848L except tag names are octet strings Either ASCII or Unicode may be used If the configuration device is generating Unicode octet strings you must set the Unicode option bit REPORTS The Rosemount 848L supports alert reports The Reports option bit must be set in the features bit string to use this feature If it is not set the host must poll for alerts 3 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L SOFT WRITE LOCK and HARD WRITE LOCK Inputs to the security and write lock functions include the hardware security switch the hardware and software write lock bits of the FEATURE_SEL parameter the WRITE_LOCK parameter and the DEFINE_WRITE_LOCK parameter The WRITE_LOCK parameter prevents modification of parameters within the device except to clear the WRITE_LOCK parameter During this time the block will function normally updating inputs and outputs and executing algorithms When the WRITE_LOCK condition is cleared a WRITE_ALM alert is generated with a priority that corresponds to the WRITE_PRI parameter The FEATURE_SEL parameter enables the user to select a hardware or software write lock or no write lock capability To enable the hardware security function enable the HW_SEL bit in the FEATURE_SEL parameter When this bit has been enabled the WRITE_LOCK paramet
111. t is closed in the open position and another switch for the closed position These are called confirm contacts even if they are proximity switches The valve position is unknown when neither switch is closed If the valve actuator has adequate power then it is rare to find both switches open except for a period of time known as the travel time when the valve is moving from one position to the other Actuators can be hydraulic pistons pneumatic pistons or diaphragms or motor driven screws in order of increasing travel time More than 80 of the actuators use compressed oil and water free air for power Valves are referred to as air to open or air to close A block valve may be controlled by push buttons or by a toggle switch There is no contactor as there is for a motor Permissive and interlock circuits may be applied The actuator may require power to be applied to open it with a spring to return it to the closed position or vice versa A block valve may be required to stay in its last position on air or power failure so there is one pilot actuator to open it and another pilot actuator to close it The pilot actuator is not usually designed for continuous power so a few second pulse may be all that is required The actuator is called a pilot because it just directs the flow of fluid power as by pushing a spool valve from one side to the other The spool valve directs the main flow to one side of the main actuator or the other like the pilot
112. t protection option option code T1 is available to protect the 848L against high energy transients The device must be properly grounded using the ground terminal GROUNDING Although not reguired a ground terminal is provided that can be connected to earth ground for optimal EMC performance A wire of 14AWG or larger is recommend using appropriate terminal connectors at both ends Transmitter Enclosure optional Ground the transmitter in accordance with local electrical reguirements SWITCHES Figure 2 5 Switch Location on the Rosemount 848L OFF ON ne Ni C NOT USED H SECURITY L SIMULATE ENABLE 848 848L 848L_17_AA EPS Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 2 6 Security After configuring the transmitter the data can be protected from unwarranted changes Each 848L is equipped with a security switch that can be positioned ON to prevent the accidental or deliberate change of configuration data This switch is located on the front side of the electronics module and is labeled SECURITY See Figure 2 5 on page 2 5 for switch location on the transmitter label Refer to Section 3 Configuration SOFT WRITE LOCK and HARD WRITE LOCK on page 3 5 Simulate Enable The switch labeled SIMULATE ENABLE is used in conjunction with the with the Discrete Input DI and Discrete Output
113. t up will use the assigned address ex Address 20 Each of the other devices will be given one of the four available temporary addresses If a temporary address is not available the device will be unavailable until a temporary address becomes available Use the host system documentation to commission a device and assign a permanent address The 848L has no moving parts and requires a minimal amount of scheduled maintenance If a malfunction is suspected check for an external cause before performing the diagnostics presented below The 848L has a green LED which indicates that the device has both DC I O power and power from the bus Once powered the green LED will remain illuminated as long as the I O power is available even if bus power is lost The red LED indicates that the Resource block is Out of Service Any hardware fault detected except open or shorted sensors will place the Resource block in the Out of Service mode The amber LEDs indicate if the 848L is detecting the sensor as open or closed To check the input circuit you can connect a working sensor at the transmitter and check it s operation Consult an Emerson Process Management representative for additional assistance It is possible that the sensor LEDs do not reflect the actual state of a sensor since they are activated by the electronics and not directly by the sensor Use appropriate electrical test equipment to verify actual sensor states If the transmitter does not co
114. ters xx xx xx military time Day of week of build 3 characters Sun Mon Month of build 3 characters Jan Feb Day of month of build 1 2 characters decimal number 1 31 Year of build 4 characters decimal Builder 7 characters login name of builder Hardware revision of that hardware that has the resource block in it Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Table C 1 Resource Block Parameters Number 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 Parameter OUTPUT_ BOARD_ SN FINAL ASSY NUM DETAILED_ STATUS SUMMARY STATUS MESSAGE DATE MESSAGE TEXT SELF TEST DEFINE WRITE LOCK SAVE CONFIG NOW SAVE CONFIG BLOCKS START WITH DEFAULTS SIMULATE IO SECURITY IO SIMULATE STATE DOWNLOAD MODE RECOMMENDED ACTION FAILED PRI FAILED ENABLE FAILED MASK FAILED ACTIVE FAILED ALM MAINT PRI MAINT ENABLE MAINT MASK MAINT ACTIVE MAINT ALM ADVISE PRI Description Output board serial number The same final assembly number specified or set by the customer Indicates the state of the transmitter An enumerated value of repair analysis Date associated with the MESSAGE TEXT parameter Used to indicate changes made by the user to the device installation configuration or calibration Used to self test the device Tests are device specific Allo
115. the appropriate channel number for packed data This feature is used in custom applications implemented in control systems such as DeltaV The DI block supports a function to invert the input and alarming PVD Simulate Optional Filter CHANNEL SIMULATE_D Invert PV FTIME FIELD VAL D ourp Alarms MODE DISC 848 848L DISCRETE1 EPS C 9 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Table C 4 Parameters Index Parameter 1 ST_REV 2 TAG_DESC 3 STRATEGY 4 ALERT_KEY 5 MODE_BLK 6 BLOCK_ERR 7 PV D 8 OUT D 9 SIMULATE D 10 XD STATE 11 OUT_STATE 12 GRANT_DENY 13 lO OPTS 14 STATUS OPTS 15 CHANNEL 16 PV FTIME 17 FIELD VAL D 18 UPDATE EVT 19 BLOCK ALM 20 ALARM SUM 21 ACK OPTION 22 DISC_PRI 23 DISC_LIM 24 DISC_ALM Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L DISCRETE OUTPUT BLOCK Supported Modes The DO block makes the value sent in SP D CAS IN D or RCAS IN D available for processing by the device The CHANNEL selection determines where the value is stored in the 848L A custom feature of the DO block in the 848L is the ability to accept 8 status bits packed into the single setpoint of a DO block This is accomplished by selecting the appropriate channel number for packed data This feature is used in custom applications implemented in control systems such as DeltaV Th
116. the motor such as clean a pump strainer or jog the motor to get its load into the right position The motor is normally controlled by the central system but must have a local station to allow the local operator to control the motor The local station has buttons for Stop and Start and a three position switch for Hand Off Auto HOA selection The control room has control when the switch is in the Auto position The motor will not run when the switch is in the Off position The Hand position allows the local start and stop buttons to control the motor The Off position is not as secure as the lockout procedure required when the equipment or the operator would be damaged if the motor started This requires all concerned people to physically put a padlock on the Off position of the main circuit breaker for the motor The motor may be started after the last person removes their lock Intermediate Stop A reversible motor may be required to come to a complete stop before starting to run in the other direction This may be done with a timer or a motion sensor on the motor or driven load shaft Redundant Motors The process may require redundant motors for reliability Usually this applies to pumps so that there is no mechanical connection between the two motors One pump may be shut off to replace seals or the entire pump and motor while the redundant pump maintains flow in the line There are three ways to control redundant pumps Alternate St
117. this theme for incompatible media or more than two choices The motor control descriptions used ladder logic Another method that takes less room on the back of an envelope is the Boolean expression The following is a comparison of Boolean and ladder operators math operators are Only three operators are used in the examples IN2 52 I l IN2 is NOT Q5 C7 53 82 S3 is OR ll ll 05 EC amp is AND Functions are the same as 848L functions The examples use TON TOF and TP Since very few applications exist for local valve control that are more than a simple toggle switch electric or pneumatic all examples use a DO block to take a command from Fieldbus The DO point is on for open and off for close in all cases F 3 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Open Auto Close Alarm Variations Output Variations Output with Interlock F 4 Those applications that use a local switch with automatic control have a three position switch arranged as Open Auto Close Inputs 1 and 2 are used for confirms so input 3 is used for Open and input 4 for Closed No input is required for Auto The Boolean expression is The 848L expression is EG1 contains OR AND NOT IN 4 DO 1 IN 3 If there is just one close confirm on input 2 then the Boolean expression is ALARM TON DO1 8 IN2 DO1 8 IN2 TravelTime If there
118. tion is the state of the latch SR set reset The parameters set and reset are functions If both are true then set wins and the result of the function is true RS set reset The parameters set and reset are functions If both are true then reset wins and the result of the function is false Shifting Functions A shift register is a set of bits that moves each bit to the next bit position when the command to shift is given The vacant bit is filled with the value of the input The 848L shift functions contain 8 bit registers The bit parameter selects the bit in the register to test The value of the function is the value of the tested bit The shift may be to the left or the right The following table shows the state of the register for three shifts after the register has been reset The input is true during the first shift evaluation and false thereafter The right most bit is bit 1 and the left most bit is bit 8 Direction Reset Left 00000000 00000001 00000010 00000100 Right 00000000 10000000 01000000 00100000 The reset parameter clears the register overriding both input and shift Reset is an optional parameter but the function can be written with three parameters or four Do not use an extra comma if reset is omitted The register data will be cleared on a processor restart i e power cycle SHL input shift reset testbit The parameters input shift and reset are functions The parameter testbit is a constant th
119. tion method known as Reverse Polish Notation RPN The RPN method requires nesting the functions like OR IN 1 IN 2 rather than using operator notation like IN 1 IN 2 This can lead to the following AND IN 1 OR IN 2 AND IN 3 OR IN 4 AND IN 5 OR IN 6 AND IN 7 IN 8 The equation is evaluated by evaluating the deepest functions first IN 7 and IN 8 If they are both true then the AND function evaluates to true Then IN 6 is evaluated then the OR evaluates to true and so on working up from the deepest level in reverse order until the first and top level AND can be evaluated The result is stored in the channel specified by EQx which contains the text of the equation as explained above Drawn as a ladder logic the equation would look like the figure below 848L LOGIC_FUNC_EXAMPLE JPG 3 15 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 3 16 Logic Operator Functions The following combinatorial operators require a minimum of 2 and a maximum of 10 functions between the parentheses each separated by a comma AND Performs the logical and of the argument functions OR Performs the logical or of the argument functions XOR Performs the logical exclusive or of the argument functions An XOR function is false if all of the arguments are the same value either all true or all false Otherwise it is true The following unary operator r
120. tions The processing cycle of the 848L logic equations from sampling the inputs to driving the outputs will vary depending upon the number and type of functions used in the 20 equations Processing time can vary in the range of 50 to 150ms Logic Functions AND OR XOR NOT Rising Edge Trigger Falling Edge Trigger Turn On Delay Turn Off Delay Pulse Counter Reset Set Latch Shift Register Right Shift Register Left Function Blocks 8 DI blocks 4 DO blocks 1 MDI block and 1 MDO block are provided Foundation Fieldbus e Links 25 VCR20 A 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L EXAMPLE FOR THE LOGIC EXECUTION This diagram shows motor starter logic with start and stop buttons and an auxiliary contact which maintains current after the start button is pressed STOP START M OVERLOAD m o iji O mm pm Pin Y a lt gt o o 4 x nu oo Y W E 14 2 14 o M O Which would translate to a Boolean eguation of AND IN 1 OR IN 2 IN 3 DIMENSIONAL DRAWINGS Figure A 2 Rosemount 848L Dimensional Drawings Top View 3 D View 6 7 170 an atom JE E Ground K A Va Screw Possess poososo poosdeda sode NG z J Input
121. tputs This manual is designed to assist in the installation operation and maintenance of the Rosemount 848L Logic Transmitter Section 1 Introduction e Overview e Considerations e Return of Materials Section 2 Installation e Mounting e Installation e Wiring e Power Supply e Commissioning Section 3 Configuration FOUNDATION fieldbus Technology e Configuration e Function Block Configuration Section 4 Operation and Maintenance Hardware Maintenance Troubleshooting Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemou nt 848L Appendix A Specification and Reference Data e Specifications e Dimensional Drawings Ordering Information Appendix B Product Certificates e Hazardous Locations Certificates e Intrinsically Safe and Non Incendive Installations e Installation Drawings Appendix C Function Blocks e Device Descriptions Block Operation Appendix D Logic Equation Syntax Error Handling Examples Appendix E Motor Control e Variations of Motor Control e Writing 848L Equations Appendix F Valve Control RETURN OF MATERIALS To expedite the return process in North America call the Emerson Process Management National Response Center toll free at 800 654 7768 This center available 24 hours a day will assist with any needed information or materials N The center will ask for the following information Product model Serial numbers The last process material to which the produ
122. transducers in the transducer block For DIRECTORY further information please refer to the Transducer Block Application Process Part 1 FF 902 specification 10 TRANSDUCER TYPE Identifies the transducer that follows 11 XD_ ERROR One of the error codes defined in FF 903 XD_ ERROR and Block Alarm Subcodes 12 COLLECTION_ A directory that specifies the number starting indices and DD item IDs of the data collections in each DIRECTORY transducer within a transducer block For further information please refer FF 902 13 IN 1 TAG An identifier associated with discrete input 1 14 IN1 The value and status of discrete input 1 15 PULSE COUNT 1 The number of pulses that have occurred on IN1 since last reset 16 IN 1 CONFIGIO TYPE The transducer type of discrete sensor 1 16 IN_1_CONFIGFILTER Any state change on IN1 that lasts for a duration less than this filter value will be ignored by the device 16 IN 1 CONFIG FAIL_ When the device detects a failure 101 will have its value set to this value SAFE 17 IN 2 TAG An identifier associated with discrete input 2 18 IN2 The value and status of discrete input 2 19 PULSE COUNT 2 The number of pulses that have occurred on IN2 since last reset 20 IN 2 CONFIGIO TYPE The transducer type of discrete sensor 2 20 IN_2_CONFIG FILTER Any state change on IN2 that lasts for a duration less than this filter value will be ignored by the device 20 IN 2 CONFIG FAIL_ When the device detects a failure 102 will have its value
123. uation functions Each has a status that is Bad if any Input status is Bad Channels 37 to 41 pack the values into one byte so that a DI or DO function block can read or write them Any block linked to a DI block with packed data must be capable of handling the packed boolean values Channels 42 to 46 may be used with standard MDI or MDO blocks Channel Type FB 37 All IN DI 38 All DO DO 39 First 8 EQ DI 40 Last 8 EO DI 41 All OUT DO 42 All IN MDI 43 All DO MDO 44 First 8 EQ MDI 45 Last 8 EQ MDI 46 All Out MDO Reading a channel value will reset all of the channel latches that are configured Channels 38 and 43 do not have latches If a DI and a MDI are both used they will interfere with the latches but the user is expected to use one or the other never both Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Logic Functions A function has a name and a set of one or more arguments contained within a closed set of parentheses The seven channel reference functions IN ICF ICR PS DO EQ and OUT have been described above These are the only functions that take a channel number as an argument The other functions require functions for all arguments unless the last argument is a constant number When a function is evaluated it leaves its true or false value behind to be evaluated by the next function or used as the result of evaluating the equation This is the result of using a simple and fast evalua
124. ubleshooting Symptom Mode will not leave OOS NAMUR Sensors Symptom I O Failure Possible Causes Target mode not set Corrective Action Set target mode to something other than OOS Resource block The actual mode of the Resource block is in OOS See Resource Block Diagnostics for corrective action i O Transducer Block The actual mode of the Transducer Block is OOS set it to Auto Possible Causes Open or shorted sensor Corrective Action Check sensor and wiring Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L 4 4 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Appendix A Reference Data Specifications page A 1 Dimensional Drawings page A 5 Ordering Information page A 7 SPECIFICATIONS Functional Specifications ROSEMOUNT Inputs 8 Discrete Inputs suitable for NAMUR specification sensors 9 32VDC sourcing sensors or general switch inputs dry contact NAMUR Sensors On state gt 2 1 mA Off state lt 1 2 mA 9 32 VDC Sourcing Sensors On state gt 50 of I O voltage Off state lt 20 of I O voltage General Switch Inputs On state lt 500 Ohms Off state gt 5k Ohms Minimum Pulse Width 1ms Maximum Pulse Input Frequency 500Hz EMERSON www rosemount com Process Management Rosemount 848L Reference Manu
125. uirements 24 VDC nominal 9 VDC minimum 32 VDC maximum Supply Current Rating 0 5 amps at 24 VDC plus output load Fieldbus Segment Power Powered over the H1 Foundation fieldbus with standard fieldbus power supplies The logic transmitter operates between 9 0 and 32 0 VDC at 22 milliamps Transient Protection consult factory for availability The transient protector option code T1 helps to prevent damage to the transmitter from transients induced on the bus power wiring by lightening welding heavy electrical equipment or switch gears This option is installed at the factory for the Model 848L and is not intended for field installation ASME B 16 5 ANSIMEEE C62 41 1991 IEEE 587 Location Categories A2 B3 1 kV peak 10 x 1000 S Wave 6 kV 3 kA peak 1 2 x 50 S Wave 8 x 20 S Combination Wave 6 kV 0 5 kA peak 100 kHz Ring Wave 4 kV peak EFT 5 x 50 nS Electrical Fast Transient A 3 Reference Manual 00809 0100 4696 Rev AA Rosemount 848L September 2004 Physical Specifications Environmental Ratings Electronics no enclosure 40 C to 85 C 99 non condensing humidity IP20 Unit electronics and enclosure 40 C to 85 C 100 condensing humidity IP66 Function Blocks H1 Segment Device Specification Back up LAS Resource Block I O Transducer Block All inputs can optionally be latched for the duration necessary for each input to be read during a macrocycle Logic Transducer Block 20 Boolean Equa
126. valve in a power steering system Two pilot solenoid valves are required if the spool latches in position or one if the spool has a spring return EMERSON www rosemount com Process Management Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Alarms Variations on Valve Control F 2 There are at least three permutations of any valve circuit 1 Steady or pulse output to the pilot solenoid or whatever piezoelectric bars are in use Steady requires one output pulse requires two 2 Confirmed position switches for open closed or both using one or two inputs 3 Automatic control or a local selector for Open Auto Close using no or two inputs these are not common Interlock and permissive may be additional permutations If a valve has one or both position switches then it is possible to alert the operator to the fact that the valve is not where it should be This is not a permuted choice because the main reason for having position switches is to alarm this condition It is not a simple alarm because time must be allowed for the valve to complete its stroke after it receives a command An On Delay timer set for the travel time is reguired All numbers in 848L equations are examples The user will want to change them Interlock There may be a process condition where it is not safe to open the valve If this condition can be detected and transformed into the change of state of a contac
127. will eventually fail There are five parameters associated with MAINT_ALARMS they are described below MAINT_ENABLED The MAINT_ENABLED parameter contains a list of conditions indicating the device or some part of the device needs maintenance soon If the condition is ignored the device will eventually fail Below is a list of the conditions with the highest priority first 1 Secondary Value Degraded 2 Configuration Error MAINT_MASK The MAINT_MASK parameter will mask any of the failed conditions listed in MAINT_ENABLED A bit on means that the condition is masked out from alarming and will not be reported MAINT_PRI MAINT_PRI designates the alarming priority of the MAINT_ALM The default is 0 and the recommended value is 3 to 7 MAINT_ACTIVE The MAINT_ACTIVE parameter displays which of the alarms is active Only the condition with the highest priority will be displayed This priority is not the same as the MAINT_PRI parameter described above This priority is not user configurable MAINT_ALM An alarm indicating the device needs maintenance soon If the condition is ignored the device will eventually fail Advisory Alarms An advisory alarm indicates informative conditions that do not have a direct impact on the device s primary functions There are five parameters associated with ADVISE_ALARMS they are described below ADVISE_ENABLED The ADVISE_ENABLED parameter contains a list of informative conditions that do not hav
128. wires through the appropriate cable glands using the pre installed cable glands see Figure 2 8 3 Install the I O wires into the correct screw terminals 4 Install the power signal wires onto the correct screw terminals Bus power is polarity insensitive allowing the user to connect positive or negative to either Fieldbus wiring terminal labeled Bus I O power is polarity sensitive and must be connected correctly to avoid damage to the transmitter See Figure 2 4 on page 2 5 5 Replace the enclosure cover and securely tighten all cover screws Figure 2 8 Installing the 848L with Cable Glands Enclosure Cover Screw 4 Power Signal Cable Gland 848 848A19A 2 9 Rosemount 848L Reference Manual 00809 0100 4696 Rev AA September 2004 Using Conduit Entries Figure 2 9 Installing the 848L with Conduit Entries 2 10 Use the following steps to install the 848L with Conduit Entries 1 2 Remove the junction box cover by unscrewing the four cover screws Remove the five conduit plugs and install five conduit fittings supplied by the installer Run sensor and output wires through each conduit fitting Install the I O wires into the correct screw terminals Install the power signal wires into the correct screw terminals Bus power is polarity insensitive allowing the user to connect positive or negative to either Fieldbus wiring terminal labeled Bus I O power is
129. ws the operator to select how WRITE LOCK behaves The initial value is Iock everything If the value is set to Iock only physical device then the resource and transducer blocks of the device will be locked but changes to function blocks will be allowed Allows the user to optionally save all non volatile information immediately Number of EEPROM blocks that have been modified since last burn This value will count down to zero when the configuration is saved 0 Uninitialized 1 do not power up with NV defaults 2 power up with default node address 3 power up with default pd_ tag and node address 4 power up with default data for the entire communications stack no application data Status of Simulate jumper switch Status of Security jumper switch The state of the simulate jumper 0 Uninitialized 1 Jumper switch off simulation not allowed 2 Jumper switch on simulation not allowed need to cycle jumper switch 3 Jumper switch on simulation allowed Gives access to the boot block code for over the wire downloads 0 Uninitialized 1 Run Mode 2 Download Mode Enumerated list of recommended actions displayed with a device alert Designates the alarming priority of the FAILED _ ALM Enabled FAILED_ ALM alarm conditions Corresponds bit for bit to the FAILED_ ACTIVE A bit on means that the corresponding alarm condition is enabled and will be detected A bit off means the corresponding alarm condition is disabled
130. y Since the 848L uses RPN begin from the lowest line in the ladder diagram and work upwards The first expression is OR IN 2 IN 3 from 2 or 3 in the ladder diagram This is one term in an AND function so build the function around it The top and final expression is AND IN 1 OR IN 2 IN 3 from 1 and 2 or 3 in the ladder diagram Enter the expression as the contents of parameter OUT1 EQ in the logic transducer block Do not forget to append the terminating semicolon Connect the buttons auxiliary contact and contactor a small relay will do in order to test the operation Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Interlock Permissive Emergency Shutdown An interlock switch is easily added as follows where input 4 is the normally closed interlock 1 2 4 Outl aa PA a a Rates EE t OUTI1 EQ a S iele The first expression is still OR IN 2 IN 3 The top and final expression is now AND IN 1 OR IN 2 IN 3 IN 4 Enter the expression and test as above A permissive switch may be added with or without the interlock as shown where 5 is the permissive 1 2 5 4 Outl 25 Rade Rees eaten aaa ft OUT1 EO e The first expression is now AND IN 2 IN 5 The second expression is OR AND IN 2 IN 5 IN 3 The final expression is AND IN 1 OR AND IN 2 IN 5 IN 3 IN 4
131. z SeU Bs t EOL 1 aa a ANE Reset T DO P EQ2 L1 DO EL T ES AAN Gia Sa t EQ4 P L2 ho L2 taa iio Set t EQ4 P L2 BES POS NEA Reset L1 P L2 Out2 Outl E TA T Sete EBE 11533 r OUTI KO 3 L1 P L2 Outl Out2 AAA NEE setae NG N5420 Jest 10UT2_E0 4 Instantiate a DO block and set the channel number to 9 Reference Manual 00809 0100 4696 Rev AA September 2004 Rosemount 848L Rung L1 is equation 1 It latches on when the start button is true and neither motor is running It unlatches when the NC stop button is pushed or the pressure stays low for too long e The expression is RS AND NOT IN 3 NOT IN 4 IN 2 OR NOT IN 1 EQ 3 Rung P is equation 2 which generates a 2 second start pulse from the rise of the run latch or the rise of the low pressure condition This pulse toggles the latch and starts the selected motor The expression is TP OR RISE DO 1 RISE EQ 1 20 Rung T is equation 3 which is a TON that is run by the on state of the low pressure and the run latch The expression is TON AND DO 1 EQ 1 100 Rung L2 is equation 4 The latch determines which motor to start and run It toggles when equation 2 generates a pulse The pulse duration is more than one evaluation cycle so rise functions are required The expression is RS AN

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