PMI-8B - BD Simex
Contents
1. 2 GENERAL CHARACTERISTICS Module type PMI 8B allows monitoring of 8 binary inputs Standard transmission functions of Modbus protocol make the device registers address state of inputs device ID accessible via RS 485 interface 3 TECHNICAL DATA Power supply voltage External fuse required Current consumption Number of independent inputs Input levels low state high state Galvanic isolation Communication interface Baud rate Number of modules in 1 network Data memory Protection level Housing type Housing dimensions L x W x D Operating temperature Storage temperature Humidity Altitude Screws tightening max torque Max connection leads diameter EMC 16 24 30 Vpc T type max 1A 20 mA typically 8 0 V 24 V All inputs are galvanically isolated from module supply and RS 485 interface RS 485 8N1 Modbus RTU 1200 115200 bit sec maximum 128 non volatile memory EEPROM type IP 20 housing and connection clips DIN rail mounted 35 mm rail 101 x 22 5 x 80 mm 0 C to 50 C 10 C to 70 C 5 to 90 no condensation up to 2000 meters above sea level 0 5 Nm 2 5 mm according to PN EN 61326 1 User manual for module with binary inputs PMI 8B This is a class A unit In housing or a similar area it can cause radio frequency interference In such cases the user can be requested to use appropriate preventive measures 4 DEVICE INSTALLATION The unit has b2. Green LED RUN stay permanently on until readdressing via RS 485 or power off While module is in this state it is possible to control its inputs and communication is possible using temporal address FFh At this moment MASTER controller should find new device and readdress it to address other than OxFF and OxFE After remote readdressing green LED indicator starts to flashes again Simultaneously with change of device address baud rate is changed to 9600 bit sec Required transmission speed 1200 bit sec to 115200 bit sec can be set by write to register 22h After change of transmission speed the device sends the answer with new baud rate While installation of the new network it is recommended to readdress all devices using baud rate 9600 bit sec and next change speed of all devices simultaneously using BROADCAST query with address OOh 6 THE MODBUS PROTOCOL HANDLING Transmission parameters 1 start bit 8 data bits 1 stop bit no parity control Baud rate selectable from 1200 to 115200 bits sec Transmission protocol MODBUS RTU compatible The device parameters and display value are available via RS 485 interface as HOLDING type registers numeric values are given in U2 code of Modbus RTU protocol The registers or groups of the registers can be read by O3h function and wrote by O6h single registers or 10h group of the registers accordingly to Modbus RTU specification Maximum group size for 03h and 10h functions ca
3. 02 09 C1 3 Reading of input 5 current state ADDR FUNC REG H L COUNT H L CRC L H 00 03 00 05 00 01 94 OB Answer ADDR FUNC BYTE C DATA H L CRC L H 01 03 02 00 01 79 84 DATA H L input state 1 it means that high state is delivered to input 5 i v gt There is no full implementation of the Modbus Protocol in the device The 1 _ functions presented above are available only f N 10 User manual for module with binary inputs PMI 8B 11 a division of BD SENSORS BD Sensors GmbH BD Sensors StraBe 1 95199 Thierstein Germany Telefon 449 0 9235 9811 2099 Telefax 49 0 9235 9811 860 e mail info bdsimex de www bdsimex de 04 2010
4. BDI SIME a division of BD SENSORS USER MANUAL for module with binary inputs type PMI 8B firmware version 2 0 or higher Ce 30 06 2009 V 1 05 Read the user s manual carefully before starting to use the unit Producer reserves the right to implement changes without prior notice User manual for module with binary inputs PMI 8B CONTENTS 1 BASIC REQUIREMENTS AND USER SAFETY erri riui ion ino nun en peo suba o a sd eran ele 2 2 GENERAL CHARACTERISTIES eerie ee oer ee ee rite eese drains 3 Bo HS a QU DATA T 3 4 DE VICE INSTALLATION iini iiti euere 4 MEI C eee 4 A2 CONNECTION METHOD asernes ee ee er M 4 BE MAINTE NANCE FC 6 D PRINCIPEE OF OPEHATION ice cs ce ge a nee emcees ese cee sce 7 6 THE MODBUS PROTOCOL HANDLING reed esse ese eee 8 oy ae os OF IE VE M een ee nee rear ea 9 6 2 TRANSMISSION ERRORS DESCRIPTION un aaa 9 6 3 EXAMPLES OF QUERY ANS WER FRAMES uec assa en lansserennener arane nEn E RER AFA euere 9 Explanation of symbols used in the manual AN This symbol denotes especially important guidelines concerning the installation and A M operation of the device Not complying with the guidelines denoted by this symbol may cause an accident damage or equipment destruction IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS RESPONSIBLE FOR POSSIBLE DAMA
5. GES EN This symbol denotes especially important characteristics ofthe unit Read any 1 j information regarding this symbol carefully 1 BASIC REQUIREMENTS AND USER SAFETY The manufacturer is not responsible for any damages caused by inappropriate installation not maintaining the proper technical condition and using the unit against its destination Installation should be conducted by qualified personnel During installation all available safety requirements should be considered The fitter is responsible for executing the installation according to this manual local safety and EMC regulations The unit must be properly set up according to the application Incorrect configuration can cause defective operation which can lead to unit damage or an accident If in the case of a defect of unit operation there is a risk of a serious threat to the safety of people or property additional independent systems and solutions to prevent such a threat must be used Neighbouring and mating equipment must meet the requirements of appropriate standards and regulations concerning safety and be equipped with adequate anti overvoltage and anti interference filters Do not attempt to disassemble repair or modify the unit yourself The unit has no user serviceable parts Units in which a defect was stated must be disconnected and submitted for repairs at an authorized service centre User manual for module with binary inputs PMI 8B
6. bles must be terminated with appropriate insulated cable tips Tighten the clamping screws The recommended tightening torque is 0 5 Nm Loose screws can cause fire or defective operation Over tightening can lead to damaging the connections inside the units and breaking the thread User manual for module with binary inputs PMI 8B A n the case of the unit being fitted with separable clamps they should be inserted 1 N into appropriate connectors in the unit even if they are not used for any connections Unused clamps marked as n c must not be used for connecting any connecting cables e g as bridges because this can cause damage to the equipment or electric shock Due to possible significant interference in industrial installations appropriate measures assuring correct operation of the unit must be applied To avoid the unit of improper indications keep recommendations listed below Avoid common parallel leading of signal cables and transmission cables together with power supply cables and cables controlling induction loads e g contactors Such cables should cross at a right angle Contactor coils and induction loads should be equipped with anti interference protection systems e g RC type Use of screened signal cables is recommended Signal cable screens should be connected to the earthing only at one of the ends of the screened cable In the case of magnetically induced interference the use of t
7. eceive and interprets BROADCAST frames but do not transmit answers 6 2 TRANSMISSION ERRORS DESCRIPTION If an error occurs while write or read of single register then the device sends an error code according to Modbus RTU specifications Error codes 01h illegal function only functions 03h and O6h are available 02h illegal register address 03h illegal data value 6 3 EXAMPLES OF QUERY ANSWER FRAMES Examples apply for device with address 1 All values are represent hexadecimal Field description ADDR Device address on modbus network FUNC Function code REGH L Starting address address of first register to read write Hi and Lo byte COUNT H L No of registers to read write Hi and Lo byte BYTEC Data byte count in answer frame DATAH L Data byte Hi and Lo byte CRC L H CRC error check Hi and Lo byte User manual for module with binary inputs PMI 8B 1 Read of device ID code ADDR FUNC REG H L COUNT H L CRC L H 01 03 00 21 00 01 D4 00 The answer ADDR FUNC BYTEC DATA H L CRC L H 01 03 02 00 8B F8 23 DATA identification code 008Bh 2 Change of the device address from 1 to 2 write to reg 20h ADDR FUNC REG H L DATA H L CRC L H 01 06 00 20 00 02 09 C1 DATAH 0 DATA L new device address 2 The answer the same as the message ADDR FUNC REG H L DATA H L CRC L H 01 06 00 20 00
8. een designed and manufactured in a way assuring a high level of user safety and resistance to interference occurring in a typical industrial environment In order to take full advantage of these characteristics installation of the unit must be conducted correctly and according to the local regulations Read the basic safety requirements on page 2 prior to starting the installation Ensure that the power supply network voltage corresponds to the nominal voltage stated on the unit s identification label The load must correspond to the requirements listed in the technical data All installation works must be conducted with a disconnected power supply 4 1 UNPACKING After removing the unit from the protective packaging check for transportation damage Any transportation damage must be immediately reported to the carrier Also write down the unit serial number on the housing and report the damage to the manufacturer Attached with the unit please find user s manual warranty 4 2 CONNECTION METHOD Caution AN Installation should be conducted by qualified personnel During installation all e available safety requirements should be considered The fitter is responsible for e executing the installation according to this manual local safety and EMC regulations Wiring must meet appropriate standards and local regulations and laws n order to secure against accidental short circuit the connection ca
9. nnot exceeds 16 registers for single frame 1 The device interprets the broadcast messages but then do not sends the answers 8 User manual for module with binary inputs PMI 8B 6 1 LIST OF REGISTERS Register Write Range Register description States of particular binary inputs addresses of registers 01h 08h No 0 or 1 correspond to particular inputs read values 1 HIGH state 24 V 0 LOW state 0 V State of all inputs read as single register particular bits are 09h No 0 OOFFh related to particular inputs Bit 0 corresponds with input 1 bit 1 to input 2 etc 20h Yes 1 FFh Device address New devices has default address FEh 21h No 008Bh Device identification code ID 2 Baud rate bit sec 0 1200 1 2400 2 4800 3 9600 Zn Ten VT 4 19200 5 38400 6 57600 7 115200 23h Vas 0 255 Denouncing Filter state 0 disabled 1 filter setting F Input frequency equals 1 F x 100 us Firmware version hexadecimal Ses ho DOSE e g value 0123h means version 1 23 1 after writing to register no 20h the device responds with an old address in the message 2 after writing to register no 22h the device responds with the new baud rate oN If register 20h is being written it is possible to use BROADCAST frame X 1 with address 00 This operation causes changing of addresses of all modules d connected to the RS 485 network Modules r
10. signal have fulfil some time restrictions see Figure 5 1 These restrictions depend on settings of internal digital filter implemented in firmware Filter allows to eliminate signal oscillations corresponding to contacts bouncing of mechanical sensors Filter is factory switched off To ensure proper working it means that module do not omit any pulse while filter is on duration of LOW to and HIGH t states must be not shorter than Fx50 us where F means filter setting While filter is off then to and t must be not shorter than 125 ms See the table below Tab 5 1 to check proper periods for all frequencies User manual for module with binary inputs PMI 8B Input signal filter setting F to ty frequency Input type 0 electronic input 1 electronic 255 12 75 ms 40 Hz or contact input Tab 5 1 Time periods to t depend on filtered frequency Forcing of OxFF address New devices has set to Modbus addresses OxFE To enhance system installation process special operation mode has been developed It allows to force address OxFF in single module using internal momentary switch mounted on module mainboard Figure 4 2 To change address of the device to FFh wait for a moment after power up until green LED RUN starts flashes Next press and hold push button about 4 seconds until green LED will lights permanently then release push button The device changes its MODBUS address to FFh and waits for a new address readdressing
11. user Pay attention to the ambient temperature in the room where the unit is operating Excessively high temperatures cause faster ageing of the internal components and shorten the fault free time of unit operation In cases where the unit gets dirty do not clean with solvents For cleaning use warm water with small amount of detergent or in the case of more significant contamination ethyl or isopropyl alcohol AN Using any other agents can cause permanent damage to the housing M 4 Product marked with this symbol should not be placed in municipal waste Please check local regulations for disposal and electronic products User manual for module with binary inputs PMI 8B 5 PRINCIPLE OF OPERATION After power on device signalizes its operation by continuous flashing of green LED marked RUN Short flash of red LED Tx MASTER means that some data is being transmitted via RS 485 interface Green LEDs marked IN1 IN8 signalize active state on particular binary inputs logic HIGH state When particular input is in active state then corresponding register value is Olh otherwise its value is 00h Register 09h contains information of all inputs compacted into single byte where particular bits are related to particular inputs see THE MODBUS PROTOCOL HANDLING a u oscillations Figure 5 1 The traces of signals a without contacts oscillations b with contacts oscillations Actualisation of registers state occurs only if input
12. wisted couples of signal cables so called spirals is recommended The spiral best if shielded must be used with RS 485 serial transmission connections In the case of interference from the power supply side the use of appropriate anti interference filters is recommended Bear in mind that the connection between the filter and the unit should be as short as possible and the metal housing of the filter must be connected to the earthing with largest possible surface The cables connected to the filter output must not run in parallel with cables with interference e g circuits controlling relays or contactors External powers supply must be connected to the module Uz Uz typically 24 Vpc and two wires RS 485 A B communication interface Inputs are placed on bottom side of the module see Figure 4 2 Figure 4 1 Method of cable insulation replacing and cable terminals User manual for module with binary inputs PMI 8B power supply RS 485 power supply 24V DC SLAVE ground M F UZ A B UZ force address OxFF swich is available through this hole IN1 IN8 inputs ground voltage inputs 0 24V front view bottom view Figure 4 2 Terminals description N N e When use of SMPS it is strongly recommended to connect PE wire 2 N e All connections must be made while power supply is disconnected 4 3 MAINTENANCE The unit does not have any internal replaceable or adjustable components available to the
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