strain gauge transmitter 6841
Contents
1. JP1 H I B KT EE Full bridge es eM B 5 IN Half bridge H Im UU i Nokeval i OO Em Connectors Alarm 1 4 3 6 3 Alarm 2 a 2 Supply voltage 1 24 VDC 4 wire connection 6 wire connection 410V i 10V A 3 H sene gt 2 Supply voltage H SEPE H i 230 VAC ov z 0v 3 i 4 4 i i seat 7 input 1 4 Voutput 4 input H 2 F 2 3 Common 3 13 B 2 gt mAoutput 4 Strain gage sensors 4 1 50 External switch Max 4 x 350 Q Serial output y RS 485 D1 Do Common A B Configuration Using front panel The transmitter can be fully configurated using the front panel keys but the numerical values can t be fed precisely since there are only four digits The configuration settings are explained in chapter Settings and using the front panel is described in chapter User interface The transmitter keeps measuring and updating the anal2. gt M Edit value The main level of the configuration menu is shown You can select among menu items using AV keys To edit the setting push P to start editing and to get back to the menu See chapter Editing for how to edit The menu is organizated hierarchically You can enter Gen In Out Alm1 Alm2 ExtSw and Ser Editing Most data types are edited with simply AV keys finally exiting with key Floating point values such as scaling and lopass filter are edited with AVP keys select digit to edit blinks with gt and change it with When the decimal point is blinking it can be moved with AV The first digit can be replaced with a minus sign Monitoring Monitor function can be used while troubleshooting to view some internal values of Submenu aA yv Item 3 2 Edit value password is not known switch the power off hold and gt keys pressed and switch the power on again PWDC is displayed briefly submenus by selecting them with keys and entering the submenu with gt key See the menu chart in page 9 When all settings are done exit from the menu with key Two options are shown Save to keep the settings made and Undo to discard all changes Select Save or Undo and push P To set a password push A to select Set means password will be used then push to enter the new password Cod 0 is shown The password is a sequence of six key presses
3. 0 1200 1 2400 2 4800 3 9600 4 19200 N 20 7 115200 6 57600 Nokeval Yritt j katu 12 37100 Nokia Finland Tel 358 3 3424800 Fax 358 3 3422066 www nokeval com 20
4. 1 Max 100 ms 2 A 250 VAC resistive External switch Threshold level Pullup Functions General Isolation Supply voltage Operating temp Humidity Weight Connectors about 2 5 V 5V 1kohm Min Max reset Tare Hold Alarm reset Input is isolated from outputs Serial and analog outputs sharing common Power supply isolated 85 260 VAC or 24 VDC 0 60 C 0 95 RH non cond 250 g 2 5 mm detachable INSTALLATION Jumpers The case has to be opened to access the jumpers Jumper locations and positions are represented in the picture Factory settings are shown bold JP1 selects between external switch input or passive 2 wire analog output on connector B1 6841 can also measure a half bridge In this case two 1 kohm 0 1 precision resistors have to be added on the circuit board and JP3 has to be closed Connector B1 is an external switch input i i Connector B1 is a passive mA output B1 B2
5. 8 30 32 34 36 38 40 41 42 43 44 45 47 49 51 53 54 55 57 58 60 62 64 65 66 67 69 71 73 74 75 76 19 21 23 25 27 29 31 33 35 37 39 46 48 50 52 56 59 61 63 68 70 72 1000 Conf In Setup Sca2 Conf In Setup Mea3 Conf ln Setup Sca3 Conf ln Setup Mea4 Conf In Setup Sca4 Conf ln Setup Mea5 Conf In Setup Sca5 Conf In Setup Mea6 Conf In Setup Sca6 Conf In Tare Value Conf In Tare Preset Conf In Tare Act Conf ln Tare AZero Conf ln Func Oper Conf In Func Reset Conf Out Range Conf Out Rdg1 Conf Out Out1 Conf Out Rdg2 Conf Out Out2 Conf Out Limit Conf ExtSw NC Conf ExtSw Delay Conf Alm1 Type Conf Alm1 Level Conf Alm1 Toler Conf Alm1 Hyst Conf Alm1 Reset Conf Alm2 Type Conf Alm2 Follow Conf Alm2 Level Conf Alma Toler Conf Alm2 Hyst Conf Alm2 Reset Conf Ser Mode Conf Ser Addr Conf Ser Baud Tare FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed ENUM See table E2 BYTE Unsigned 0 30 ENUM See table E4 ENUM See table E2 ENUM See table E5 FLOAT Signed FLOAT Signed FLOAT Signed FLOAT Signed BOOL BOOL FLOAT Unsigned ENUM See table FLOAT Signed FLOAT Signed FLOAT Unsigned ENUM See table E7 ENUM See table BOOL FLOAT Signed FLOAT Signed FLOAT Unsigned ENUM See table E7
6. ENUM See table E8 BYTE Unsigned 0 255 ENUM See table E9 BYTE The unit can be tared offset to zero by writing value 84 T to holding register 1000 Input registers Register 0 1 Name Type Values Mon Rdg_ FLOAT Signed 2 3 Mon Mea FLOAT Signed 4 5 MommV FLOAT Signed 6 7 Mon Excit FLOAT Signed 8 9 Mon Tare FLOAT Signed 10 11 MomOut FLOAT Signed 1000 Mon Rdg WORD Signed The current scaled reading can be read from input register O in IEEE754 floating point form or alternatively from holding register 1000 as a 16 bit integer The integer should be divided by 10 Dec where Dec is the location of the decimal point set in configuration menu In Dec to get the real reading Starting from firmware version 2 3 the input readings can be read from Holding registers 5000 onwards in floating point format the same way they are read from Input register 0 onwards They are available in integer format from register 6000 onwards Enum explanations Table E1 Value Speed 0 4 Hz 1 10 Hz 2 14Hz Table E2 Value Reset 0 Off 1 FP 2 ExtSw 3 Both Table E3 Value Range 0 40mV 1 100mV 2 180mV Table E4 Value Oper 0 Off 1 Min 2 Max Table E5 Value Range 0 Off 1 V 2 mA Table E6 Value Type 0 Off 1 Lo 2 Hi 3 LoNc 4 HiNc 5 Inside 6 Outside 7 Settled Table E7 Value Reset 0 Auto 1 FP 2 ExtSw 3 Both Table E8 Value Mode 0 SCL 1 Modbus 2 ASCII Table E9 Value Baud
7. The maximum length of the command is 220 bytes The maximum length of the response is the same This sets the limit to number of registers with commands 3 and 16 The command 17 will return 0x11 lt bytecount gt 0x00 OxFF followed with 6841 V2 3 A123456 for example When the serial connection settings are changed the changes do not affect until the transmitter is powered down This is to prevent breaking the connection while making the changes Data types BOOL Off on setting Only the least significant bit is used BYTE One byte setting Only the lower word of the Modbus register is used WORD 16 bit setting ENUM Option list setting The options listed in section Enum tables CODE Password 12 bits 0 not used FLOAT 32 bit floating point number IEEE 754 Least significant word first LSWF little endian Within one Modbus register the data is represented the most significant byte first MSBF big endian Holding registers Register Name Type Values 0 Conf Gen Cfcode CODE 1 Conf Gen Opcode CODE 2 Confin Dec BYTE Signed 2 4 3 4 ConfiinlLopass FLOAT Unsigned 5 ConfimLP3 BOOL 6 Conf ln Speed ENUM See table E1 7 8 Conf Iln Dead FLOAT Signed 9 Confin Hold ENUM See table E2 10 Conf In Setup Range ENUM See table 11 Confin Setup Pts BYTE Unsigned 0 6 12 13 ConfinSetupMMeal FLOAT Signed 14 15 ConfiiniSetupiScal FLOAT Signed 16 17 ConflmSetupMea2 FLOAT Signed 18 20 22 24 26 2
8. USER MANUAL 14 2 2013 V2 3 STRAIN GAUGE TRANSMITTER 6841 Nokeval INTRODUCTION 6841 is a DIN rail mounted strain gauge weighing transmitter It is equipped with a small display and push buttons to allow configuration without a separate programming device There are also two alarm relays analog output and RS 485 serial output with Nokeval SCL and Modbus protocols The sensor can be connected using 6 wire measurement to eliminate wire resistance effect Sensor excitation is about 10 volts DC The device can be calibrated or taught in up to six points SPECIFICATIONS Input Excitation From transmitter Externally Max wire resistance Max load Measurement Ranges Input impedance Inlinearity Zero error Zero drift Gain drift Update rate Analog output mA output Range Accuracy 25 Overrange Max load V output Range Accuracy 25 Overrange 10 V 10 150 mA 2 5 11 VDC 100 ohm 78 ohm 40 40 mV and 40 100 mV gt 10 Mohm lt 0 02 lt 0 01 mV 10 lt 100 ppm C about 4 Hz 10 and 14 Hz also available but with less accuracy 0 20 mA or less e g 4 20 0 008 mA 0 21 mA typ 1000 ohms 0 10 V or less 0 005 V 0 10 6 V typ Serial output Protocols Baud rates Bit configuration Response time Alarm relays Maximum load Nokeval SCL or Modbus RTU or ASCII CRLF auto transmission 1200 57600 bit s SCL ASCII 8N1 Modbus 8E
9. ading corresponding to physical output value specified in Out1 Out1 Physical output V or mA corresponding to reading Rdg1 Rdg2 Reading corresponding to Out2 External switch One external switch can be connected to the transmitter The switch may be used for one or more of the following e Min Max function reset In Func Freset e Zero Tare In Tare Act e Input hold In Hold e Alarm reset Alm1 Reset and Alm2 Reset Note To be able to use the switch jumper J5 must be in correct position See page 3 Settings concerning the external switch input are in ExtSw submenu Alarm relays Alm1 and Alm2 There is two independent alarm relays They can be freely to low level or high level or window alarms The second alarm level can be set to follow the first so that they can be adjusted together Alarm settings are accessed in the configuration menu Alm1 and Alm2 submenus but the alarm levels are also accessible in the Operator menu see page 6 Out2 Output corresponding to Rdg2 Limit Output limit e No Analog output will use the whole physical range in overrange situations about 0 11 V or 0 21 mA e Yes Analog output is limited between Out1 and Out2 Used with chart recorders typically Example 4 20mA signal wanted from weighing reading 0 1000 kg Set Range mA Rdg1 0 kg Out1 4 mA Rdg2 1000 kg Out2 20 mA NC Reverse operation normally closed e Normall
10. e sets Level 500 But if we know that an additional 5 kg comes after the valve has closed we can compensate this by setting Toler 5 making the actual alarm level be 495 kg Serial output Serial output RS 485 can be used for reading measurement results and for configuration Configuration settings concerning the serial output are in Ser submenu See also the chapters concerning the serial protocols Mode e SCL The transmitter is a slave using Nokeval SCL protocol and responds when told to In this state it can be used in data acquisition systems or configured with Nokeval configuration software e Modbus The transmitter is a slave using Modbus RTU protocol and responds when addressed e ASCII The transmitter sends readings using ASCII characters without being commanded The reading is composed of Other settings Gen submenu contains settings that are not associated with inputs or outputs With window alarms Inside and Outside Toler setting defines the window width the alarm levels are Level Toler and Level Toler Hyst Alarm hysteresis When an alarm has activated it won t deactivate until the reading goes back the amount specified in Hyst setting Always a positive value Example High level alarm at Level 50 Hyst 5 Alarm activates when the reading goes over 50 but deactivates at 45 Reset Alarm hold reset e Auto Alarm deactivates when the reading goes below over the set limit by the Hyst va
11. ended to remove taring Set In Tare Value to 0 000 This is not necessary but helps checking 2 Select measurement range In Setup Range 3 Select number of teaching points In Setup Pts 4 Apply the least heavy weight first weight is often O kg 5 Go to Meal in In Setup submenu so that Mea1 appears on the display 6 Press and keep pressed P key and press A too Then release them both Current input signal is displayed Exit with 7 Feedthe correct weight of the calibration weight in Sca1 8 Repeat operations 5 7 for Mea2 Sca2 etc advancing from smallest weight to the next If using MekuWin configuration program use Lock operation small L button next to the value on Mea1 6 to copy the current input to the Mea value Enter the real weight in the correspondig Sca LP3 Select between first order No and third order Yes lowpass filter Third order filter gives faster settling and better damping Speed There is three measurement rates to select from 4 10 and 14 measurements sec The accuracy specifications are valid for 4 sec only Dead Dead zone around zero If the reading is closer to zero than the Dead value the display is rounded to zero This is especially handy in weighing and flow measurement applications To prevent negative values only set Dead 0 To disable the dead zone set Dead 1 or any negative value If auto zero function In Tare AZero is engaged Dead setting is used
12. l can be attenuated with an adjustable lowpass filter and the input can be freezed with Hold function Sensor signal is converted to engineering units with up to 6 signal display value pairs This way combines both the scaling and the linearization Tare function can be used for zeroing the tare weight or other zero error Tare value can be set either by feeding it with front panel keys or let the transmitter to tare itself to a preset value Dead function hides small zero drifts by dropping the display reading to zero when the sensor signal falls below the set level It can alternatively be used to prevent negative readings Display and outputs can be configured to follow minimum or maximum value Minimum and maximum memory can be reset on front panel or with an external switch These values are not preserved during power off The final reading is shown on the display and the same reading is used for analog output serial output and alarms USER INTERFACE Front panel Alarm indicators Configuration state indicator O Select Enter start editing operator menu v Nokeval Exit 6800 Series Normal state In normal state this device displays the current measurement reading continuously functioning as an indicator The A1 and A2 indicator LEDs indicate the current state of the alarms Operator menu Normal state Alarm level 1 Alarm level 2 Tare Reset hold Reset hold A Co
13. lue without operator intervention e FP Alarm is not deactivated until the operator resets it with key in normal state e ExtSw Alarm is not deactivated until reset by the external switch e Both Alarm can be reset both with front panel and with the external switch Alarm cannot be deactivated by any means when the alarm conditions are still met e g reading exceeds the high level alarm level characters 0123456789 and may be preceded by spaces The reading is terminated by CRLF ASCII codes 13 and 10 Addr Serial bus address With SCL protocol use address 0 123 With Modbus use 1 247 When using SCL this unit will respond at address 126 too Baud Baud rate 1200 2400 4800 9600 19200 38400 or 57600 bits sec Other transfer parameters are fixed to 8 data bits no parity 1 Stop bit this is 8N1 except with Modbus they will be 8E1 Cfcode Password to Configuration menu When set configuration settings can t be accessed without knowing this Setting When Cfcode is displayed push gt Select A Set and push gt Cod 0 is displayed Enter six keypresses e g 4AY Y X and then the same again If these matched Set is displayed again and you can exit with 3 Disabling When Cfcode is displayed push gt and select V Off Opcode Password to Operator menu where alarm levels and min max memories can be accessed See Cfcode above about entering SCL COMMANDS Nokeval SCL protocol is
14. nf AV Edit level AV Edit level Alarm levels and minimum maximum memory can be accessed without entering the configuration state Use the P key to select operator function Alarm level 1 Alarm level 2 Minimum Maximum Normal the blinking indicator LED indicates the current function When an alarm LED is blinking the alarm level can be changed Press A or Y until the first digit starts blinking then edit as described in chapter Editing To reset the alarm when alarm reset is Normal N Al 1 N Al 2 N Min Max If some function for FP key is enabled in the configuration menu see e g Tare function you can activate the function by pressing key The device is in this state after power up Maximum Reset Minimum Reset not auto press for one second while alarm LED is blinking Both alarms are reset separately When a A1 LED is blinking together with Conf LED minimum reading is displayed and it can be reset with key press for one second A2 with Conf blinking indicates correspondingly maximum reading If password is set Opcode in configuration menu alarm level cannot be changed nor functions reset without entering the correct password Configuration state Press A and simultaneously two seconds to enter configuration state When entered the Conf LED will light If configuration password is set you will need to enter it Cod 0 displayed In case the Conf menu M Edit value
15. nsor signals Mea1 must be in ascending order Mea1 lt Mea2 lt Meas etc Mea1 6 Sensor signals mV V corresponding to readings in Sca settings The signal is given as the sensor output divided by the sensor excitation as this ratio is not dependent on the current excitation voltage Sca1 6 Scaled readings kg ton N that should be displayed with sensor signals in Mea settings The measurement unit can be any Other input settings General input settings found in In submenu Dec The number of digits on the right hand side of the decimal point Selectable between 2 and 3 If the number of digits won t fit in the display the decimal count is automatically decreased temporarily A negative value means that there is no decimals and that the right most digits will always be zero E g Dec 2 the display is rounded to 0 100 200 etc Lopass Digital lowpass filter for input Functions like a RC circuit damping variations in the reading Set the time constant in seconds Recommended value 1 To disable filtering set to 0 Teaching If precise test weights are available the transmitter can be taught with these weights correcting both sensor and transmitter errors The transmitter is used to measure the sensor signal and the precise readings are paired with these results The sensor signal can be investigated using Monitor function but there is an easier way to do the teaching 1 Itis recomm
16. og output and alarms but the serial output is not available Using configuration software MekuWin program free from Nokeval web site is used to configure the device using RS 485 communication lf connection fails check the communications settings using front panel keys to match those in MekuWin and make sure the device is in SCL mode The settings are described in chapter Settings and the MekuWin program has a manual of its own The transmitter keeps measuring during the configuration and the MekuWin monitor function can be used to see the current results OPERATION Display Scale Dead Func A Output Alarms kg ton N Ext switch 6841 weighing strain gauge transmitter feeds about 10 V excitation voltage to the sensor Alternatively an external excitation 2 5 11 VDC can be used There is no need for precision voltage source as 6841 measures the excitation voltage When using 6841 to excite the bridge 6 wire connection can be used so that bridge excitation is measured using separate wires eliminating errors from wire resistance The transmitter has two analog inputs see block diagram above excitation sense and the sensor signal mV The mV signal is first divided by measured excitation voltage resulting in relative signal mV V Because the bridge excitation is very seldom exactly 10 000 V you should always speak of the relative signal mV V Disturbances in the signa
17. s to browse messages in case there is more than one active message 6841 has three diagnostics messages e ExcLow Bridge excitation voltage is below 2 V Check the wiring e Overrange mV input has been overranged Check the wiring and input range selection In Setup Range e ADErr Error in communication with A D converter The transmitter needs service SETTINGS Menu tree z CfCode oc z Gen OpCode In Out LL Extsw z NC n ES Alm1 Delay Am p Type Ser 5 Mode Follow Type 2 O Addr al Level Level lt 5 5 E a Baud x Toler E Toler x Hyst Hyst Reset Reset Page numbers Gen 13 In Setup 9 In Dec Hold 10 InTare 11 In Func 11 Sensor setup Sensor signal is converted to force or weight value in In Setup submenu First select appropriate measurement range In Setup Range Then select how many linearization scaling points you need Pts Feed the corresponding amount of sensor signals Mea1 in mV V and the corresponding readings 1 The sensor signals can be also teached if test weights are available Se
18. specified in a separate manual that can be downloaded from Nokeval web site Commands available are TYPE Returns model number and software version 6841 V2 2 without quotation marks SN Returns the serial number if it is stored in the transmitter e g A123456 MEA CH 1 Returns the latest reading the same value that can be seen on the display Uses characters 0123456789 Scientific representation e g 3 2e 6 is not used The reading has always six significant digits negative readings five TARE Adjusts the Tare value so that the current reading corresponds to the In Tare Preset value The transmitter will indicate 0 0 this on MN XXXXXXXXXX Configuration commands from MekuWin configuration software CH 1 AV 1 xxxxx Changes alarm 1 level to xxxxx Alm1 Level Possible characters are space decimal point and digits 0 9 CH 1 AV 2 Changes alarm 2 level Alm2 Level MODBUS COMMANDS Supported commands 3 Read Holding Registers reading the settings 6 Write Single Register changing the settings 16 Write Multiple registers changing the settings 17 Report Slave ID checking the device type 109 Meku Mekuwin configuration software uses this When the settings are changed by writing a Holding register the settings are stored in the non volatile EEPROM memory immediately It might take several dozens of milliseconds for the transmitter to respond to the next command
19. tch see ExtSw submenu e Both either of the previous Options e not used e FP using front panel key e ExtSw with external switch see ExtSw submenu e Both either of the previous Preset The reading to which the transmitter will tare itself when the switch selected in In Tare Act is activated The transmitter calculates new In Tare Value so that the reading corresponds to Preset with current input signal AZero Automatic zeroing When the reading on the display has been close enough to zero the time specified here 1 30 sec the transmitter calculates new tare value to get exactly zero reading The zone width is specified with In Dead To disable set to zero In this case In Dead will work as specified Reset Function reset switch select When the switch selected here is activated the minimum and maximum memories are reset to the current reading This applies to the minimum and maximum values seen in the Operator menu too Options e not used e using front panel key e ExtSw with external switch see ExtSw submenu e Both either of the previous Analog output The analog output follows display reading with all the functions lowpass filter dead zone tare min max func etc Settings associated to analog output are in Out submenu Range Range selection e Off no analog output e V voltage output 0 10V or less e mA current output 0 20mA or less Rdg1 Display re
20. to determine the auto zero range and the dead zone operation is not used Hold Input hold When the switch selected here is activated the input reading is freezed to its current value until the switch is deactivated Tare function There is three methods to change zero shift tare value e Enter the shift tare manually to In Tare Value e Letthe transmitter to zero itself to zero or other value In Tare Act and Preset e Let the transmitter auto zero itself when the reading is near enough zero In Tare AZero Settings associated with zero shift tare are in In Tare submenu Value Value that is subtracted from the reading You can feed the tare offset manually Example If the display shows readings that are too low by 7 2 correct this by decreasing the Tare Value by 7 2 Act Tare zero switch select When the switch specified here is activated the transmitter will tare itself to the value specified in In Tare Preset Input special functions Special functions for input can be selected in In Func submenu Oper Special function select e Off nothing special e Min display and outputs follow the minimum reading e maximum reading Minimum and maximum are not preserved over power off situations See also Freset and Operator menu While freezed the display shows Hold alternately with the reading Options e not used e FP using front panel key e ExtSw with external swi
21. tup Range Dec Pts Lopass Meat LP3 Scat H a Speed Value Mea2 z Dead PreSet Sca T 2 Tare Act Meas E Hold AZero 2 Scas z Func MERE Sca4 E 2 Range s Reset Mea5 Rdg1 E g Sca5 gt E Out u 3 Mea6 3 Rdg2 dg Sca6 2 lt Out2 Limit Out 12 ExtSw 12 Alm1 Alm2 12 Ser 13 Range The measurement range for mV input The maximum 11 V excitation is used so determine the maximum sensor signal by multiplying its sensitivity mV V with 11 and select appropriate range The ranges are e 40 mV 40 40 mV e 100 mV 40 100 mV e 180 mV 40 130 mV Example sensor gives 2 mV V with maximum load applied so maximum signal is 2x11 22 mV Select 40 mV range The sensor signal can be examined using Monitor function if its magnitude is not known See page 7 Pts Number of scaling linearization points e 0 No scaling Sensor signal mV V is used as is on the display and outputs e 1 One point scaling One sensor signal mV V and one display reading kg ton N is set and the transmitter calculates the coefficient using these Zero signal gives zero reading e 2 Two point scaling Two signal reading pairs are entered giving possibility for zero shift e 3 6 Several points scaling linearization Several signal reading pairs are entered and linear interpolation used between these Outside the points linear extrapolation with two nearest points is used Se
22. using all the four keys Enter the same password twice if they match Set is shown again and you can exit with If they didn t match Off is shown Redo from start To disable a password push Y to select Off and exit with 3 the transmitter It can be accessed either from the front panel or using the configuration software Monitor mode is entered in the normal state by pressing Y and together Monitored item can be changed with AY To return to the normal state push ltems Some items are shown in the block diagram in page 5 in a rounded corner boxes e Rdg Latest reading the same that is displayed in normal state e Mea Latest unscaled measurement result mVN attenuated with lowpass filter This value is mV value divided by Excit value e mV Latest measurement result from bridge mV signal e Excit Latest measurement result from bridge excitation voltage V e Tare Current zero shift tare value the same value as In Tare Value in configuration menu e Out Current output signal V or mA e Alarms Current state of the alarms 0 none 1 Alarm1 2 Alarm2 3 both active e ExtSw Recognized state of the external switch Off not active On active Latest item in the Monitor menu is Diag that can be used to view fault conditions detected by the transmitter In monitor mode use V key to select Diag and push P If nothing happens there is no active diagnostics messages But if happens you can use AY key
23. y open contact NO activated by closing the points or pulling the voltage low e Yes Normally closed contact NC activated by opening the points or letting the voltage be pulled high by the internal pullup Delay Operation delay to enhance immunity to disturbances Set the time in secods that the Switch must be activated or deactivated to be recognized The time is rounded to nearest multiple of 0 26 seconds When power supply is cut off the relay 1 will open NO and the relay 2 close NC Alm1 and Alm2 submenus Type Alarm type e Off Not used e Lo Alarm when reading goes below Level Toler e Hi Alarm when reading goes over Level Toler e LoNc Like Lo but relay operation inverted e HiNc Like Hi but relay operation inverted e Inside Alarm when reading is between Level Toler Level Toler e Outside Alarm when reading is not between Level Toler Level Toler e Settled Alarm when the reading has settled In this type the other alarm settings are not used except the Reset setting Level and Follow Alarm level value See also Toler If Alarm 2 has its Follow set on its actual level is Alarm 1 level added with Alarm 2 level This way both levels can be adjusted together and Alarm 2 level is not seen in Operator menu Toler With Lo Hi LoNc and HiNc alarms Toler is an offset that is added to the Level setting This can be used in batching Operator is going to batch 500 kg so h
Download Pdf Manuals
Related Search