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www.controltechniques.com

Modbus

Digistart

0477-0009-01

User Guide

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Summary of Contents for Digistart CS

Page 1: ...www controltechniques com Modbus Digistart 0477 0009 01 User Guide ...

Page 2: ...this guide are believed to be correct at the time of printing In the interests of commitment to a policy of continuous development and improvement the manufacturer reserves the right to change the specification of the product or its performance or the content of the guide without notice All rights reserved No parts of this guide may be reproduced or transmitted in any form or by any means electric...

Page 3: ... 2 Trip codes 8 5 3 Examples 9 5 4 Modbus error codes 9 6 AP ASCII Protocol 10 6 1 Commands 10 6 2 Status retrieval 11 6 3 Data retrieval 11 6 4 Calculating the checksum LRC 12 7 Modbus Control via Remote Keypad 13 7 1 Grounding and shielding 13 7 2 Termination resistors 13 7 3 RS485 data cable connection 13 7 4 Remote Keypad RS485 network connection specifications 13 7 5 Using the Remote Keypad w...

Page 4: ... control voltage from the soft starter before attaching or removing accessories Install the Modbus Module using the following procedure Figure 2 1 Attach the module to the starter Digistart CS Plug the module onto the side of the soft starter 08627 A Digistart IS 1 Line the module up with the comms port slot 2 Press the top retaining clip of the module into the soft starter chassis 3 Press in the ...

Page 5: ...Connection Figure 3 2 Modbus Module connections Digistart CS Digistart IS 08649 A 1 2 3 08650 A 1 2 3 Digistart CS Digistart IS Remote mode Modbus Module RS485 serial port DI2 24V Stop RS485 connection onto Modbus network DI3 24V Reset Modbus Module RS485 serial port RS485 connection onto Modbus network For the Modbus Module to accept serial commands a link must be fitted across terminals CSL DI2 ...

Page 6: ...ter must be configured for 2 stop bits with No Parity and 1 stop bit for odd or even parity For 10 bit transmission the Master must be configured for 1 stop bit In all cases the Master baud rate and slave address must match those set on the Modbus Module DIP switches 5 Modbus Functions The Modbus Module supports the following Modbus functions 03 Read multiple registers 06 Write single register Mod...

Page 7: ...tor current A 40006 Motor temperature Multiple read Motor 1 temperature thermal model 40007 Multiple Bit Description Product type read 0 to 2 Product parameter list version and version 3 to 7 4 Digistart CS 8 Digistart IS 40008 Serial protocol version Multiple read 40009 2 Parameter management Single write and multiple read Pr 1A Motor Full Load Current to Digistart IS maximum register address sta...

Page 8: ...dule and soft starter 16 Network communication between module and network 17 Internal fault 18 Overvoltage 19 Undervoltage 20 Ground fault 23 Parameter out of range 24 Input B trip 26 L1 phase loss 27 L2 phase loss 28 L3 phase loss 29 L1 T1 shorted 30 L2 T2 shorted 31 L3 T3 shorted 32 Motor 2 overload thermal model 331 Time overcurrent Bypass overload 35 Battery clock 36 Thermistor circuit 37 RTD ...

Page 9: ...op Message Starter Address Function Code Register Address Data CRC In 20 06 40020 4 CRC1 CRC2 Out 20 06 40019 4 CRC1 CRC2 5 4 Modbus error codes Table 5 3 Error codes Code Description Example 01 Illegal function code Function other than 03 or 06 02 Illegal data address Register number invalid 03 Not readable data Register not allowed for data reading 04 Not writable data Register not allowed for d...

Page 10: ...e ASCII number representing the soft starter address where each decimal digit is represented by n lrc two byte longitudinal redundancy check in hexadecimal ccc three byte ASCII command number where each character is represented by c dddd four byte ASCII number representing the current or temperature data where each decimal digit is represented by d ssss four byte ASCII number The first two bytes a...

Page 11: ...e 4 1 Positive phase sequence only valid if bit 6 1 5 1 Current exceeds FLC 6 0 Uninitialised 1 Initialised 7 0 Communications are OK 1 Communications device fault 6 3 Data retrieval Data can be retrieved from the soft starter using the following format Figure 6 3 Data retrieval format Send address ACK Send request Receive data Possible error responses NAK Invalid LRC Master Slave soft starter Req...

Page 12: ...OMPLEMENT 01h 0000 0001 1 5Bh 0101 1011 2 s COMPLEMENT 3 ASCII 5 B ASCII CONVERT 4 or 35h 42h LRC CHECKSUM The complete command string becomes ASCII STX B 1 0 5 B ETX or 02h 42h 31h 30h 35h 42h 03h To verify a received message containing an LRC 1 Convert last two bytes of message from ASCII to binary 2 Left shift 2nd to last byte four bits 3 Add to last byte to get binary LRC 4 Remove last two byt...

Page 13: ...rone to excessive noise interference termination resistors should be installed between the data lines at both ends of the RS485 cable This resistance should match the cable impedance typically 120 Ω Do not use wire wound resistors Figure 7 1 Installation with termination resistors 03250 B 1 2 3 Network master RS485 Remote Keypad RS485 Soft starter RS485 7 3 RS485 data cable connection Daisy chain ...

Page 14: ... on the network In order to access Programming Mode the Remote Keypad must be powered up when the soft starter is not running 7 6 1 Programming Procedure 1 To enter Programming Mode hold down the Data Prog pushbutton for four seconds The default value of the first parameter will be displayed 2 Use the Data Prog pushbutton to advance to the next parameter 3 Use the Stop and Reset pushbuttons to adj...

Page 15: ...d Network start stop quick stop function enabled 1 3 Remote Keypad start stop quick stop function disabled Network start stop quick stop function disabled 1 2 9 Current 10 0 0 off required for Digistart CS 1 on not suitable for Digistart CS 1 Remote Keypad Reset pushbutton is always enabled 2 RS485 Network reset and forced communication trip functions are always enabled 7 7 Troubleshooting The Rem...

Page 16: ...ng action plastic mounting clips x 2 Connections Soft starter 6 way pin assembly Network 5 way male and unpluggable female connector supplied Maximum cable size 2 5 mm2 Settings Protocol Modbus RTU AP ASCII Address range 0 to 31 Data rate bps 4800 9600 19200 38400 Parity None Odd Even 10 bit Timeout None off 10 s 60 s 100 s Certification C IEC 60947 4 2 CE IEC 60947 4 2 ...

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