What rules must be followed with almost all programmable logic controllers?
What will be an ideal response?
The following are the rules that must be followed with almost all programmable logic controllers:
1. Each line of logic must end with a coil.
2. Coils cannot be connected in parallel.
3. The program will be scanned in the order that it is entered.
4. Generally, coils cannot be assigned the same number. (Some programmable logic controllers require reset coils to reset counters and timers. These reset coils can be assigned the same number as the counter or timer they reset.)
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