Troubleshooting/diagnostics

• Check the hardware and software requirements described in this documentation (TwinCAT version, CE image version etc.);
• Compare the interoperability check list of control station and substation;
• Check the IO configuration and mapping of PLC variables in TwinCAT System Manager (configuration of serial interface, baudrate, parity, stoppbits settings). Compare them to the parameters set in the substation;
• Check whether the FB_IEC870_5_103TProtocol function block issues an error code;
• Check the protocol parameters that are transferred to the FB_IEC870_5_103TProtocol function block (link address, link address octet size, FRAMELength etc.). Compare them to the parameters set in the substation;
• Check the max. configured ASDU length (instance of ST_IEC870_5_103TBuffer, TX/RX data buffer). Compare them to the parameters set in the substation;
• Check the configured data points (type, ASDU address, function number, information number etc.);
• Check if the other communication partner issues an error code;
• Activate the debug output during connection establishment and/or of ASDU data. Open the TwinCAT System Manager and activate the LogView window. Analyze/check the debug output strings;