EnableIn parameter and ladder diagrams
In a ladder diagram, the EnableIn parameter reflects the rung state when it enters the instruction. If the rung state preceding the instruction is True (1), the EnableIn parameter is True and the primary logic routine of the instruction executes. If the rung state preceding the instruction is False (0), the EnableIn parameter is False and the primary logic routine does not execute.
TIP:
In a ladder diagram, an instruction that has only Input parameters, with the exception of EnableOut, is treated as an input instruction and is left justified. The rung-out condition uses the EnableOut parameter.
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