Modbus/Tcp Protocol - Festo CPX-FB36 Electronics Description

2. Preparing for commissioning
2.2

Modbus/TCP protocol

2-10
Modbus is an open communication protocol based on the
master-slave architecture. This is a standard for communica-
tion via TCP/IP in automation technology.
The Modbus/TCP protocol is activated with DIL
switch 1.2 = ON. The bus node is then identified with the des-
ignation: FB36-MB - Modbus TCP Remote-IO
After switching the protocol (
unmodified parameters are available:
– IP address
– Diagnostics mode
– System parameters
The DIL switch function remains unchanged.
Retentive bus-specific parameters are only active if the relev-
ant protocol is selected (
The configuration options via Modbus TCP correspond to
those via EtherNet/IP.
Exception: EtherNet/IP objects cannot be accessed via Mod-
bus TCP.
In order to configure the CPX terminal for Modbus/TCP, you
will require the Modbus addresses of the data and of the I/Os
of the CPX terminal (
Addressing examples can be found in appendix D.6.1.
section 1.2.1) the following
section 1.2.1).
appendix D).
Festo P.BE-CPX-FB36-EN en 1309NH English