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Count Down (CTD)

The CTD instruction counts downward each time the rung-condition-in transitions from false to true. Ladder DiagramOperand Data Type Format DescriptionCounter COUNTER tag Counter structurePreset DINT immediate Value of Counter.PRE.Accum DINT immediate Value of Counter.ACC.COUNTER ...

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PLC Alarm Logic Alarm Set Operation Instruction (ASO)

This information applies to Compact GuardLogix 5380, CompactLogix 5380, CompactLogix 5480, ControlLogix 5580 and GuardLogix 5580 controllers. The alarm set operation instruction issues a specified operation on all alarm conditions of the specified alarm set. The alarm set operation instruction ...

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