Hello everyone,
I’m new to PLC and I’m learning micro820 with connected components workbench.
My question is why the last rung takes control. I wrote a program for Allen Bradley micro 820 using CCW this program uses a buzzer on two different time. After running the program in the simulator, I can see the last rung that involve the buzzer is activate, but why the first condition of the buzzer is being ignored. If I cancel the last rung that involve the buzzer the first condition is working fine.
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It’s standard in most PLC platforms. The PLC will run through all the rungs and then set the input and output points at the end. It’s just the cycle of how the software is executed.
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