Examine on contacts look like NO contact symbols and must have NO contacts on the associated field device wired to the input pin for that address.

Question

Quizplus · Accepted Answer

Examine on contacts in a PLC program are represented by symbols that look like normally open (NO) contacts, but they do not require a physical NO contact wired to the input pin. They represent a logical condition where the input or bit is "true" when the condition they are examining is met, regardless of the physical wiring.

Examine on Contacts Look Like NO Contact Symbols and Must