I am trying to setup some alarming where the alarm triggers when sensor value is outside a normal range and will delay clearing for X amount of time or when the latched alarm bit in the PLC is cleared. I got this to work with the high high alarm, but when I apply exactly the same settings to the low low alarm it doesn’t work. The low low alarm immediately clears once the sensor returns to a value above the low low setpoint. The screenshots below show how the high high and the low low alarms are setup. I can’t figure out why it works with the HH and not with the LL, to me they look like they are setup identically and should function the same. Can anyone see a reason why the LL alarm clears immediately? I am 100% sure that the Analyzer-LL tag latches in and stays at a value of 1 until the alarm reset command is given.
