Measurement data

Each module of the Measure group provides the recorded measurement data as output process data via a defined Data Area.

The measurement data is divided into logically separate structures, which can be individually enabled or disabled as required under Data Area in the Enable column. When starting up, the module automatically recognizes the activated structures and only reads the relevant measured values from the EtherCAT Terminal.

Each of these structures begins with a timestamp (Timestamp), which indicates the time of the last update in distributed clocks time (DC time). This is followed by the diagnostic structure (Diag), which contains status information such as when measuring ranges are exceeded or not reached. This is followed by the actual measurement data, which can be divided into further substructures, for example to distinguish between phase-neutral (LN) and phase-phase voltages (LL).

By default, the measured values are output as RMS values per phase and as a total value across all three phases. They are expressed in SI units (e.g. Volt, Ampere, Watt) as floating-point numbers with single precision according to IEEE 754.

The following is an overview of the data types for corresponding structures: