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Download SRW01 - Communication ModBus-RTU
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Summary SUMMARY ABOUT THIS MANUAL ........................................................................................... 5 ABBREVIATIONS AND DEFINITIONS ................................................................................................... 5 NUMERICAL REPRESENTATION ........................................................................................................... 5 1 INTRODUCTION TO SERIAL COMMUNICATION ................................................. 6 1.1 THE MODBUS-RTU PROTOCOL .................................................................................................... 6 1.2 TRANSMISSION MODES ............................................................................................................... 6 1.3 RTU MODE MESSAGE STRUCTURE ................................................................................................ 6 1.3.1 Address.............................................................................................................................................. 7 1.3.2 Function Code................................................................................................................................... 7 1.3.3 Data Field ......................................................................................................................................... 7 1.3.4 CRC ................................................................................................................................................... 7 2 ACCESSORY KIT .................................................................................................. 8 2.1 MODBUS-RTU INTERFACE ............................................................................................................ 8 2.1.1 Modbus-RTU Kit ................................................................................................................................ 8 2.1.3 Power Supply .................................................................................................................................... 9 2.2 CONNECTION WITH THE NETWORK ............................................................................................ 9 2.3 MODULE CONFIGURATION ......................................................................................................... 9 2.4 STATUS INDICATION .................................................................................................................... 9 3 RELAY PARAMETERIZATION ............................................................................. 10 P202 P220 P232 P233 P277 P278 P279 P280 P281 P282 P283 P284 P310 P313 P314 P725 P726 P770 P771 P772 P773 P774 P775 P780 P781 P782 P783 P784 P785 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – OPERATION MODE ............................................................................................................... 10 LOCAL/REMOTE SELECTION ................................................................................................. 10 REMOTE COMMAND SELECTION .......................................................................................... 10 RETENTIVE OR IMPULSIVE CONTROL (FIELDBUS) ................................................................... 10 DIGITAL OUTPUT O1 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O2 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O3 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O4 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O5 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O6 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O7 FUNCTION .......................................................................................... 11 DIGITAL OUTPUT O8 FUNCTION .......................................................................................... 11 CONFIGURATION OF THE SERIAL INTERFACE BYTES ............................................................. 12 COMMUNICATION ERROR ACTION ...................................................................................... 12 SERIAL WATCHDOG .............................................................................................................. 13 COMMUNICATION MODULE ADDRESS ................................................................................ 13 DEVICENET/MODBUS BOARD BAUD RATE ............................................................................ 14 READING PROGRAMMABLE PARAMETER #1 .......................................................................... 14 READING PROGRAMMABLE PARAMETER #2 .......................................................................... 14 READING PROGRAMMABLE PARAMETER #3 .......................................................................... 14 READING PROGRAMMABLE PARAMETER #4 .......................................................................... 14 READING PROGRAMMABLE PARAMETER #5 .......................................................................... 14 READING PROGRAMMABLE PARAMETER #6 .......................................................................... 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #1 .................................................. 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #2 .................................................. 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #3 .................................................. 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #4 .................................................. 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #5 .................................................. 14 VALUE OF THE READING PROGRAMMABLE PARAMETER #6 .................................................. 14 4 MODBUS-RTU COMMANDS USED AT THE SRW 01 .......................................... 15 4.1 01H COMMAND: READ COIL STATUS ........................................................................................ 15 4.2 02H COMMAND: READ INPUT STATUS ....................................................................................... 15 4.3 03H COMMAND: READ HOLDING REGISTER .............................................................................. 15
