ComAp InteliDrive FLX LITE - Page 86

ID-FLX Lite Global Guide
86
The complete description of Modbus communication protocol can be found in Modbus Protocol Reference
Guide PI-MBUS-300 and Open Modbus Specification Release 1.0. Both documents are available from web site
at www.modicon.com .
Example: Request: 01 03 00 35 00 03 15 C5
01 = Controller address
03 = Modbus function code (Read Multiple Registers)
00 35
= Register address: Register number (40054) – 40001 = 53 DEC => 35 HEX IL-NT
Register address: Register number (40061) – 40001 = 60 DEC => 3C HEX IC-NT
00 03
= Number of registers (40054 – Oil press, 40055 – Engine temp, 40056 – Fuel level)
= 3 DEC = > 03 HEX
C5 15 = CRC (write LSB MSB !)
Image 7.1 A part of Cfg Image (Modbus Register …)
Example: Response: 01 03 06 00 27 00 2E 00 2B 35 64
01 = Controller address
03 = Modbus function code (Read Multiple Registers)
06 = Length of read data in Bytes (in HEX)
00 27 = 27 HEX => 39 DEC => 3,9 Bar (Oil pressure is represented with 1 decimal in Bars)
00 2E = 2E HEX => 46 DEC => 46°C (Engine temperature is represented with 0 decimals in °C)
00 2B = 2B HEX => 43 DEC => 43% (Fuel level is represented with 0 decimals in %)
64 35 = CRC