Alarms, Faults, and Warning play a critical role within every PLC Program. This logic allows the programmer to capture any abnormalities, alert the operator of a failure, and prevent system damage. Ultimately, this code is needed to make sure that equipment is brought to a safe condition after a critical failure.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/plc-alarm-programming-fault-capturing-example-in-ladder-logic-rslogix-500-allen-bradley