AH500 Programming Manual 7.1 Error Codes and LED Indicators Columns a. Error code: If the error occurs in the system, the error code is generated. b. Description: The description of the error c. CPU status: If the error occurs, the CPU stops running, keeps running, or in the status defined by users. Stop: The CPU stops running when the error occurs. Keep: The CPU keeps running when the error occurs. Self-defined: The status of the CPU can be defined by users. Please refer to section 8.2.1 in Operation Manual for more information. d. LED indicator status: If the error occurs, the LED indicator is ON, OFF, or blinks. ERROR: The system error BUS FAULT:
The I/O bus error Module ERROR: The module error LED indicators 7.1.1 CPU Modules 7-2 LED indicator Description The status of the CPU ON: A serious error occurs in the system. ERROR OFF: The system is normal. Blinking: A slight error occurs in the system. CPU The status of the I/O bus ON: A serious error occurs in the I/O bus. BUS FAULT OFF: The I/O bus is normal. Blinking: A slight error occurs in the I/O bus. The status of the module ON: A serious error occurs in the module. Module ERROR OFF: The module is normal. Blinking: A slight error occurs in the module. Error code Description CPU Status LED indicator status ERROR BUS FAULT 16#000A Scan timeout (SM8:
The watchdog timer error) Stop Blinking Keep 16#000B The program in the PLC is damaged. Stop ON Keep 16#000C The program downloaded to the PLC is incorrect. Stop Blinking Keep 16#000D The CPU parameter is damaged. Stop ON Keep 16#000E The program or the parameter is being downloaded, and therefore the PLC can not run. Stop Blinking Keep 16#000F The original program in the PLC is damaged. Continue Keep Keep 16#0010 The access to the memory in the CPU is denied. Stop ON Keep 16#0011 The PLC ID is incorrect. (SM9) Continue ON Keep 16#0012 The PLC password is incorrect. Continue ON Keep 16#0013 The I/O module can not run/stop.
(SM10) Stop Keep ON 16#0014 The procedure of restoring the system can not be executed. (SM9) Stop ON ON 16#0015 The module table is incorrect. (SM10) Stop ON Keep