Rievtech PR-12 Series, User Manual And Programmers Manual

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6.1.2 Normally open immediate and normally closed immediate.
When PLC executes the instruction, the immediate instruction
obtains the actual input value, but the PLC does not update
the process image register.
The immediate contact update does not depend on the PLC
scan cycle; it will be updated immediately.
When the actual input point is 1, normally open immediate is
closed.
When the actual input point is 0, normally closed immediate is
closed.
In LAD,normally open immediate and normally closed
immediate instructions are represented by contacts.
Forcing function can ’ t be used for immediate input instructions.
6.1.3 NOT Reverse instruction
The functions of "NOT instruction" are as follows:
When the input is 0, the output is 1.
When the input is 1, the output is 0.
In LAD, the NOT instruction is represented by a contact.
Example: