M221 with Ecostruxure Machine Expert Basic - Always ON and Always Off Bits.

Issue:

Using EcoStructure Machine Expert Basic to program M221 PLCs in ladder logic, are there Always On and Always Off Memory Bits from the System bits (%S) that could be used?

Product Line:

EcoStructure Machine Expert Basic (all versions)

TM221 controllers

Resolution:

From the Machine Expert Basic help, there are no system bits (%S) listed for Always ON and Always OFF.

But in ladder logic it is easy way to program an Always ON and an Always OFF bits using normal memory bits (%M). See screenshot below.

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