AH500 Operation Manual 7. DIP switch 8. RST button 9. CLR button 10. RUN/STOP switch 11. COM2 (for AHCPU5xx-RS2) 2-7 Number Name Description 1 Model name Model name of the CPU module Operating status of the CPU module RUN LED ON: The user program is being executed. indicator OFF: The execution of the user program stops. Blinking: The user program is in a debugging mode. Error status of the CPU module ERROR LED ON: A serious error occurs in the system. indicator OFF: The system is normal. Blinking: A slight error occurs in the system. Error status of the I/O bus BUS FAULT ON: A serious error occurs in the I/O bus. LED indicator OFF: The I/O bus is normal. 2 Blinking:
A slight error occurs in the I/O bus. System status of the CPU module ON: The external input/output is forced ON/OFF. SYSTEM LED OFF: The system is in a default status. indicator Blinking: The CPU module is being reset./The value in the device is being cleared. COM LED indicator Communication status of the communication port COM1 LED OFF: There is no communication through the communication port. indicator Blinking: There is communication through the communication port.
COM2 LED indicator 3 USB port Providing the mini USB communication interface 4 Ethernet port Providing the Ethernet communication interface (for AHCPU5xx-EN) 5 COM Providing the RS-232/RS-485/RS-422 communication interface 6 SD slot Providing the SD interface Function which the system executes OFF: No action (default) SW1 ON: Write protection OFF: No action (default) ON: The system is restored when the CPU module is supplied with SW2 powered. (The user program, the CPU paramter, the module table, and the setting values in the devices are restored from the memory card to the CPU module.) OFF: No action (default) 7 DIP switch ON: It is used with the CLR button to backup the system.
(The user SW3 program, the CPU paramter, the module table, and the setting values in the devices are backupped from the memory card to the CPU module.) It is used with SW3. OFF: When the system is backed up, the values in the devices are SW4 backed up. ON: When the system is backed up, the values in the devices are not backed up. Resetting the CPU module, and restoring it to the default factory value P.S. After the CPU module is reset, the ERROR LED indicator is ON, and the 8 RST button error code 16#1402 is shown. To make the PLC operate normally, users need to execute ISPSOFT.exe to set the module table in HWCONFIG. 9 CLR button Clearing the value in the latched device