Modbus Tcp/Rtu Addressing; I/O Data Addressing; Special Data Addressing - ICPDAS GW-7433D User Manual

4.2 Modbus TCP/RTU Addressing

4.2.1 I/O Data Addressing

The GW-7433D provides a piece of the internal memory for saving I/O
data. The table 4-2 shows the detail information of the memory type, data type,
address, and so on. After using GW-7433D Utility to configure the mapping
information of the CANopen slaves, users can get the mapping table between
the Modbus address and CANopen data. The information of the Modbus
memory assignment and corresponding data type are shown below.
Memory Command
Type Start Addr
DI 0000h
DO 0000h
AI 0000h
AO 0000h

4.2.2 Special Data Addressing

The GW-7433D supports special data such as the error status of the
CANopen slave, reset command, and so on. The table 4-3 shows the details of
these special data addresses.
Type Address
AI Max. AI address + n
*1 *2
AI Max. AI address + N + 1
*3
AI Max. AI address + N + 2
*3
GW-7433D MODBUS TCP/RTU to CANopen Gateway User Manual
(Version 2.1.0, Aug/2019)
PLC Max
Start Addr channel
00001h 3072
10001h 3072
30001h 640
40001h 640
Table 4-2: I/O Data Addressing
Read n
*4
Read the GW-7433D's error status.
*4
Read the GW-7433D's CAN status.
*5
Support CANopen
Data Type
Boolean
Boolean
Byte, Word, 4-byte
Byte, Word, 4-byte
Description
th
CANopen slave's error status.
Support
Function
2
1, 5, 15
4
3, 6, 16
26