Cyclic diagnosis

Directly below the PROFINET controller there are variables containing general information about the state of the PROFINET communication.

These data are exchanged between the PROFINET driver and TwinCAT 3.

The process data DevState. contains information about the physical communication status of the device, such as the link status or whether the sender resources are still adequate.

The source process data devCtrl currently has no function.

The Error variable shows possible problems when establishing a connection and counts the PROFINET devices affected by an error.

The diagnosis variable provides status information about an existing connection. The variable counts the PROFINET device affected by a warning or diagnosis.