Options have been added to the SPA2 standalone alarm trip. The band alarm feature combines the high and low trip alarms into one alarm to warn of a process that has left its normal operating conditions. The stuck input alarm monitors the input with respect to time and trips when that input hasn’t changed by a user-selected rate over a user-selected time period. The rate-of-change alarm includes alarming on a process variable that is rising, falling or moving in either direction too fast. The fault alarm includes input saturation to identify when the input signal exceeds 110% of calibrated input range, an out-of-range alarm and broken wire alarm.
