B&B Electronics GW-7433D - Manual - Manual (Page 25)

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 Function Name Class Affects Data Type
1 Read Multiple Coils 1 DO Bit
2 Read Multiple Input Discrete 1 DI Bit
3 Read Multiple Registers 0 AO Word
4 Read Multiple Input Registers 1 AI Word
5 Write Single Coil 1 DO Bit
6 Write Single Register 1 AO Word
15 Force Multiple Coils 2 DO Bit
16 Force Multiple Registers 0 AO Word
Table 4-1: Modbus Commands
GW-7433D MODBUS TCP/RTU to CANopen Gateway User Manual 25
(Version 2.0.0, Jul/2011)