In a recent post, we’ve covered the importance of properly defining alarms, faults & warnings within a PLC routine. Although we went over the basics, an advanced practice would require us to go a step above what we’ve defined by implementing ladder logic which would capture the first fault which occurred. The purpose of this logic would be to notify the operator or engineer which fault came first as in many cases, an array of faults would be triggered after the first one.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/plc-alarm-programming-advanced-alarm-capturing-in-ladder-logic-rslogix-500-allen-bradley