How to get the submodule information of a Profinet device in the IEC program?

[DominikSchaefer]

In the following example you can see how to access the submodules of a Profinet device.

The ProfinetCommon library, which has been available since EcoStruxure Machine Expert V2.0, serves as the basis for this.

PROGRAM SR_Main
VAR
    deiInfo:    DED.DEVICE_INFO;
    result:     DED.ERROR;
    nextResult: BOOL;

    submodule:  ProfinetCommon.SubmoduleInfo;
    submodules: ProfinetCommon.SubmoduleIterator;
END_VAR

// Get the device information of your Profinet device
result := <PN-Device>.GetDeviceInfo(deiInfo := deiInfo);

// Initialize the list of submodules
IF (submodules.InitByID(deiInfo.idSystem)) THEN
    // Iterate through the list of submodules
    nextResult := submodules.Next(submodule => submodule);
END_IF

The object submodule contains then the information of the first submodule of the ProfiNet device. In order to get the information of all submodules, you can use FOR and the SubmoduleIterator to loop through all submodules.