Basic Values Period 1Ph

The Basic Values Period module calculates analysis values for the signal curve of current and voltage over time. These include the mean value, the RMS value, the peak value, the rectified value, the crest factor and the form factor for current and voltage. The results refer to a configurable number of signal periods. The period duration refers to the frequency specified at the input at the start of the period. The optional statistical results refer to the entire runtime or the time at which the statistical results were last reset.

In the Beckhoff Information System you will find the documentation of the corresponding PLC function block FB_PMA_BasicValues_Period_1Ph.

In the Beckhoff Information System you will find the documentation of the TF3650 TwinCAT 3 Power Monitoring function with descriptions of the corresponding PLC library.

Configuration parameters

Buffer Length: Length of the input buffer.

Sample Rate [Hz]: Sample rate (samples per second) of the input signal.

Min Input Current [A]: Minimum input value (RMS) of the current. This parameter prevents the calculation of input values that are too small.

Periods: Number of periods that influence the calculation. (Period length = sample rate/frequency).

Input values

Frequency: Current frequency of the input signal. Is used to determine the length of the period at the beginning of a period. The output of the Frequency Period1 Ch module can be used.
Input Voltage: Input values of the voltage.
Input Current: Input values of the current.
Reset Statistics (optional): TRUE resets the min. and max. values of the outputs.

Output values

Mean U: Mean voltage value over n periods
RMS U: RMS value of the voltage over n periods.
Peak U: Peak value of the voltage over n periods.
Rectified U: Rectified voltage value over n periods.
Crest Factor U: Crest factor of the voltage (peak value/RMS value).
Form Factor U: Form factor of the voltage (RMS value/rectified value).
Mean I: Mean value of the current over n periods
RMS I: RMS value of the current over n periods.
Peak I: Peak value of the current over n periods.
Rectified I: Rectified value of the current over n periods.
Crest Factor I: Crest factor of the current (peak value/RMS value).
Form Factor I: Form factor of the current (RMS value/rectified value).