What is SCAN in PLC?

Sharad Jaiswal
Sharad Jaiswal

Posted On: Feb 22, 2018

 

SCAN is the procedure, which any sequential operation of the program controller must go through. It is the process of the operation going from the top to the bottom of the ladder in the ladder diagram. The process results in all updated outputs, which correspond to the given inputs. The process of SCAN takes place from the left to the right of each rung in the ladder diagram. Scan time is basically the total time needed to read the input, process the logic of the program and update the corresponding output in a single cycle. Generally, the time for SCAN is of the order milliseconds and it is a continuously running process.

    Related Questions

    Please Login or Register to leave a response.

    Related Questions

    PLC Interview Questions

    What is PLC?

    PLC is a digitalized computer used in industries to manufacture robotic and automobile devices. It is used in automatio..

    PLC Interview Questions

    What are different components Of PLC?

    Different components of PLC include:Input/output Modules: These are basically the modules, which depend on the input ..

    PLC Interview Questions

    What are various applications of PLC?

    The main application of PLC is in industries but other applications of PLC include: Driving Motors Light Lamps Button S..