C h a p t e r 1 2 Tr o u b l e s h o o t i n g1 2 - 312_12.1 Troubleshooting12.1.1 Basic troubleshooting stepsThis chapter includes the possible errors the can occur during operation, their causes, and corrective actions.(1) Check the following: The PLC should be operated in a safe environment (consider environmental, electronic, and vibration safeties). Connect power supply correctly to the PLC. Secure the module, terminal, and cable installations. All LED indicators show correctly. Set all switches correctly.(2) Check the following operational functions: Switch the RUN/STOP state Check the settings for the AS Series to RUN/STOP Check and eliminate errors from external devices Use the System Log function in ISPSoft to check system operation and logs(3) Identify possible causes: AS Series or external device CPU or extension modules Parameters or program settings12.1.2 Clear the Error StatesUse the following methods to clear the error states. If the error source is not corrected, the system continues to show errors.(1) Switch the CPU model state to STOP and then to RUN.(2) Turn off the CPU and turn it on again.(3) Use ISPSoft to clear the error logs.(4) Reset the CPU to the default settings and download the program again.
