6.8
Managing the module using MODBUS TCP
MODBUS TCP protocol is listening on port 502.
The module supports following functions of MODBUS protocol:
- 0x01 Read Coils,
- 0x03 Read Holding Register,
- 0x05 Write Single Coil,
- 0x06 Write Single Register,
- 0x0F Write Multiple Coils,
- 0x10 Write Multiple Registers.
The registers description is shown in tables 2 and 3.
MODBUS TCP - Holding Registers.
Register
Name
Mode:
R-read
W-write
Description
4003
Counter1H
R/W
Counter 1 – Higher byte of counter
4004
Counter1L
R/W
Counter 1 – Lower byte of counter
MODBUS TCP - Coils
Register
Name
Mode:
R- read
W-write
Description
1000
On1
R
Input 1 state
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