Modbus Tcp/Rtu Interface; Commands - ICPDAS GW-7433D User Manual

4 Modbus TCP/RTU Interface

The GW-7433D supports class 0, class 1 and partial class 2 Modbus slave
functionalities. The Modbus TCP client or Modbus RTU master connected to
the GW-7433D needs to follow the Modbus TCP/RTU specification 1.0.
The GW-7433D can handle maximum 5 Modbus TCP connections, and one
RS-232(COM1) or RS-485(COM2) connection simultaneously.

4.1 Commands

The following Modbus TCP/RTU commands are supported by the GW-7433D.
Function
1 Read Multiple Coils
2 Read Multiple Input Discrete
3 Read Multiple Registers
4 Read Multiple Input Registers
5 Write Single Coil
6 Write Single Register
15 Force Multiple Coils
16 Force Multiple Registers
GW-7433D MODBUS TCP/RTU to CANopen Gateway User Manual
(Version 2.1.0, Aug/2019)
Function Name
Table 4-1: Modbus Commands
Class Affects Data Type
1 DO Bit
1 DI Bit
0 AO Word
1 AI Word
1 DO Bit
1 AO Word
2 DO Bit
0 AO Word
25