Modbus_Tcp Library - SMB MAT-LC-C Series User Manual

E.3

Modbus_TCP library

1）Modbus_Tcp Master MBUS_TCP_REQ
Table E-5 MBUS_TCO_REQ instruction
Parameter
First
IP
Port
Unit
RW
Addr
Count
DataPtr
Done
Error
2）Modbus_Tcp Slave MBUS_TCP_SLAVE
Description
The activation bit (0: inactive 1: active)
activated once and the instruction executed
once.
Salve ipaddress,eg.'192.168.0.X'
Slave port number,eg.502
Slave unit number,eg.0
Read/Write
0：Read
1：Write
Read and write register address
(eg.40001,30001)
Read and write bytes (value range0-120
characters)
Read/write pointer (where data is read or
written to a register)
Done bit
0: Instruction is being executed
1: Instruction is completed
Error code
134
Data type Initialization
BOOL 0
STRING 192.168.0.X
WORD 502
BYTE 0
BYTE 0
DWORD 0
INT 0
POINTER
0
TO BYTE
BOOL 0
BYTE 0