2 Examples of Modbus TCP

There are “Modbus TCP” examples.

First, it’s very simple example to control industrial devices.

original source is http://www.fleaplc.it/en/tutorials/29-arduino-mega-2560-modbus-tcp-server-2-en

Software used:

1. Arduino IDE 1.5.5 (free download  from Arduino main website)
2. Arduino Modbus (free download  from here)

Second, it’s more complex example for Modbus TCP with Multiple I/O used Arduino Uno, Mega & RaspberryPI.

The original source is http://www.fleaplc.it/en/tutorials/33-arduino-as-raspberry-pi-s-remote-io-codesys.

So I though to realize a cheap fully working distributed architecture where:

• Raspberry PI= PLC Controller (Codesys 3.5 SP
• Arduino Mega 2560= 1st remote I/O
• Arduino Uno=  2nd remote I/O
• Modbus TCP/IP: communication protocol

+ ++= (PLC + remote I/O)

and source code is available at there.

you can get source code

Merga2560_src 0.8 kB

Raspberry_src 54 kB

Uno_Src 0.5 kB