Schneider Electric 840 USE 106 0 manual Use Constants Instead of Open Inputs

Additional Guidelines for IEC Hot Standby

Use Constants Instead of Open Inputs

Programmed The number of unused pins should be reduced to the absolute minimum, so as to

Logicnot waste any memory for hidden allocated memory that is used nowhere.

But there are some cases where this is just not possible, as in the example below.

Therefore the logic should look like the diagram below.

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