This project demonstrates Siemens S7-200 PLC is connecting with Node.js server through RS232 (RS232 to RS485 conversion by MOXA) and sending and receiving commands from each side. In airfield light control system, it connects with CCR (Constant Current Regulator) and controls Lightening Levels by 5 stages and gets a back-indication values to PC (Node.js Server).
Main interface and Wirings are meant to build the Airfield control system, which I will name as Polaris, for Mongolian Domestic Airports.
Enjoy your watch.
Far more information, you could contact to [email protected].