PLCs
What is Latch?
Definition
A PLC programming function that holds a digital output in its current state until explicitly reset by another instruction. Latching circuits maintain motor run status, alarm conditions, and sequence states through scan cycles.
Related Terms
Latching Relay
A relay that maintains its contact position after the coil is de-energised until...
Ladder Logic
A graphical programming language for PLCs that resembles electrical relay circui...
PLC (Programmable Logic Controller)
A ruggedized digital computer used to automate industrial processes by reading i...
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