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POUs under the Safety Application

POUs (EtherCAT Safety) are the programming blocks of CODESYS Safety for EtherCAT Safety Module. They are declared as PROGRAM.

A maximum of 32 POUs can be added to the project tree of the safety application for the EL6900 terminal EtherCAT Safety, and a maximum of 64 POUs for the EL6910 and EK1960. If this value is exceeded, then the compiler issues an error.

. Properties of a POU type block (EtherCAT Safety)

  • Cannot be called by other programs

  • Can call function block instances from libraries

  • Called directly by the system

Adding a safe POU

  1. In the project tree, select the SafetyApp object.

  2. In the context menu, click Add Object → POU (EtherCAT Safety).

  3. In the Add POU (EtherCAT Safety) dialog, specify the name and comment of the POU and click Add to close the dialog.

    EL6900_SafetyProjectCreatePOU.png

  4. In the object properties, configure the deactivation method.

    For more information, see: Dialog: Properties – POU (under SafetyApp).

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