Modbus Tcp - Algodue ELETTRONICA UPM209 Manual Del Usuario

Example Byte Description
20
High
Starting register
3C Low
00 High
2 words to be read
02 Low
C7 High
CRC
0F Low
Response example: 01030400018599
01 - Slave address
03 - Function code
04 - 4 data bytes
00 High
00 Low
3 phase, 4 wire, 3 current wiring mode
00 High
01 Low
85 High
CRC
99 Low

5.2 MODBUS TCP

The following tables show some reading examples in MODBUS TCP.
Values contained both in Query and Response messages are in hex format.
88 MODBUS RTU/ASCII, TCP