VEGA VEGAFLEX 83 Modbus and Levelmaster protocol PFA insulated - Manual (Page 78)

78
11 Supplement
VEGAFLEX 83 • Modbus and Levelmaster protocol
41838-EN-130314
Parameter Length Code/Data
Number of Registers 2 Bytes 1 to 127 (0x7D)
Response:
Parameter Length Code/Data
Function Code 1 Byte 0x03
Start Address 2 Bytes 2*N
Register Value N*2 Bytes Data
FC4 Read Input Register
With this command, any number (1-127) of input registers can be read out. The start register, from
which the readout should start, and the number of registers are transmitted.
Request:
Parameter Length Code/Data
Function Code 1 Byte 0x04
Start Address 2 Bytes 0x0000 to 0xFFFF
Number of Registers N*2 Bytes 1 to 127 (0x7D)
Response:
Parameter Length Code/Data
Function Code 1 Byte 0x04
Start Address 2 Bytes 2*N
Register Value N*2 Bytes Data
FC6 Write Single Register
With this function code an individual holding register can be written.
Request:
Parameter Length Code/Data
Function Code 1 Byte 0x06
Start Address 2 Bytes 0x0000 to 0xFFFF
Number of Registers 2 Bytes Data
Response:
Parameter Length Code/Data
Function Code 1 Byte 0x04
Start Address 2 Bytes 2*N
Register Value 2 Bytes Data
FC8 Diagnostics
With this function code different diagnostic functions can be triggered or diagnostic values read out.