Modbus Tcp Objects; Commands And Addresses - Festo CPX-E-EP Manual

3 Parameterisation
3.2

Modbus TCP objects

The following sections describe the representation of the system CPX-E within the Modbus TCP object
model. Many of the terms shown are the original English terms of the protocol specification, and are used
for clarity in any language.
3.2.1

Commands and addresses

The table below shows the connection between the Modbus address and data/parameters of the system CPX-E.
The data are assigned to various groups.
Command Function code
read 3
4 x registers
write 6, 16
4 x registers
read/write 23
4 x registers
read device 43
identification
Tab. 3.34
Festo – CPX-E-EP-EN – 2017-07 – English
Modbus address Significance
45357 ... 45391 Status information
45392 ... 45647 Process data inputs
45648 ... 45655 Diagnostic memory parameters
45656 ... 46055 Diagnostic memory data
40001 ... 40256 Process data outputs
40257 ... 40264 Diagnostic memory parameters
45357 ... 45391 Status information
45392 ... 45647 Process data inputs
45648 ... 45655 Diagnostic memory parameters
45656 ... 46055 Diagnostic memory data
40001 ... 40256 Process data outputs
40257 ... 40264 Diagnostic memory parameters
Objects Objects IDO 1, 2, 3, 4, 5
Access Group
read A
B
C
C
write D
E
read A
B
C
C
write D
E
read F
37