s7-200 PLC learning exercise

H

Thread Starter

huynhxuan

Hello everyone,

I am learning PLC with s7-200. There is an exercise which I can't do, its subject "There are 8 sensors, among them have one was breaked down. I have to write a program to define it", it means that "How can I know it was failed by my program"?

please help me. I am pressing.

thanks.
 
=> Nice answer!! But if you are an expert, maybe you can tell me how to detect a broken sensor if the sensor does not have any built in selftest?
 
how about putting in timers that if input does not change over a set time will set true a word, that word would be sensor specific? just an idea.
 
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