ST_PMA_Frequency_Period_3Ph

Structure that summarizes the results of the corresponding function block. It can be queried via the property stResults. Details on the values contained can be found in the comment or in the description of the function block FB_PMA_Frequency_Period_3Ph.

Syntax

Definition:

TYPE ST_PMA_Frequency_Period_3Ph :
STRUCT
    aFreq         : ARRAY[0..2] OF LREAL;           // [Hz]   | f     | Frequency calculated by zero crossings
    aFreq_Min     : ARRAY[0..2] OF LREAL;           // [Hz]   | f_min | Min value of aFreq
    aFreq_Max     : ARRAY[0..2] OF LREAL;           // [Hz]   | f_max | Max value of aFreq
    aRocof        : ARRAY[0..2] OF LREAL;           // [Hz/s] |       | Rate of change of frequency (ROCOF)
    eRotDirection : E_PMA_RotationalDirection_3Ph;  // Rotational direction
END_STRUCT
END_TYPE

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT v3.1.4024.0

PC or CX (x86, x64)

Tc3_PowerMonitoring