This PLC application about Mitsubishi PLC FX Series Communication with Arduino / Microcontroller. Arduino such as Analog Input and Analog Output for Mitsubishi PLC FX Series. Analog Input of Arduino transfer to D1 of Mitsubishi PLC FX, and D1 to PLC Output. PLC Input to D0 of Mitsubishi PLC FX, and transfer to Analog Output of Arduino.