Zero Frequency Detection

Zero Frequency Detection alerts you when the frequency that is reported on an input is less than the Zero Frequency limit. When a Zero Frequency condition exists, the Zero Frequency Alarm is triggered.

Configure the

O.Counterxx.ZeroFrequencyAlarmLimit

tag to establish the minimum frequency that is required to be measured at the input before which the Zero Frequency Alarm is triggered.

Zero Frequency Detection is commonly used in lower frequency applications that monitor the continued presence of pulses at a minimum frequency and above. When the Zero Frequency alarm is triggered, the assumption is that the counting device is not lost but instead that the input frequency is low.