DataAreas
The inputs and outputs of the process data are configured in the Data Areas of the module. The areas Inputs and Outputs contain the structures for exchanging the process data (PDOs) with the EtherCAT Terminal, while the determined measured values are provided in the Measures area (see Measurement data).
For different use cases, the EL3453 offers the option of exchanging various process data objects (PDOs) cyclically. The configuration can be used to define which measured values are transmitted cyclically as PDOs and which are transmitted acyclically as SDOs. In order to map this behavior in the TwinCAT modules, the process data used can also be specifically selected there. Typical use cases are already available in the module as predefined PDO sets. This also enables automated mapping of the process data between the EtherCAT Terminal and the TwinCAT module.
The following table provides an overview of the predefined PDO sets of the EtherCAT Terminal with the corresponding Data Areas in the TwinCAT module:
Data Areas | PDOs | Use case |
|---|---|---|
Default | Default | Cyclic recording of voltage, current and power measurement. |
Variant | Default + Variant | Use variant handling instead of SDOs for extended measurement data. |
Distributed | DPM | For combination with EL3444 and EL3446 using Distributed Power Measurement (DPM) |