DiagnosisDataBuffer (FB)

FUNCTION_BLOCK DiagnosisDataBuffer

Example: check diagnosis data of a device

PROGRAM PLC_PRG
VAR
    diagBuffer : ProfinetCommon.DiagnosisDataBuffer;
    slot : UINT;
    channelError : ProfinetCommon.ChannelErrorType := 0;
    i : DINT;
END_VAR

diagBuffer(xEnable := pnDevice.xDiagnosis, ID := pnDevice.ID, DiagnosisIndex := 0);    // check diagnosis of device 'pnDevice'
IF(diagBuffer.UpdatedDiagnosis) THEN                        // some diagnosis data changed ?
    FOR i := 0 TO diagBuffer.DiagnosisCount - 1 DO          // iterate all diagnosis entries
        diagBuffer(DiagnosisIndex := i);                    // select next Diagnosis Entry that shall be shown in outputs
        IF(diagBuffer.IsStandardFormat) THEN
            //e.g slot 2 has channel error 'Line Break'
            slot := diagBuffer.Source.Slot;
            channelError := diagBuffer.Diagnosis.ChannelErrorType;
        END_IF
    END_FOR
    diagBuffer.DiagnosisIndex := 0;     //reset to first entry
END_IF

InOut:

Scope Name Type Comment Input xEnable BOOL enable operation ID DWORD Device ID DiagnosisIndex DINT selected DiagnosisIndex (range 0..DiagnosisCount) Output xBusy BOOL TRUE if function block is operating xError BOOL error occured, see STATUS output STATUS DWORD 0 = OK. UpdatedDiagnosis BOOL shadowed diagnosis data has been updated since last execution of this function block (e.g. an alarm has been received in the mean time) DiagnosisCount DINT number of diagnosis entries that are stored for this device IsStandardFormat BOOL The diagnosis information is in standard format, use the data in output Diagnosis. IsUSIFormat BOOL The diagnosis information is in USI format, use the data in output DiagnosisUSI. Source DiagnosisSource The diagnosis source is the information where the diagnosis is located on the device. Diagnosis ChannelDiagnosisData The diagnosis information in standard format. DiagnosisUSI DiagnosisInformationUSI The diagnosis information in USI format. UpdateTime DT The timestamp when this diagnosis has been updated (UTC time) or 0 if unknown.