Chapter 9 Troubleshooting 9.2.1. AHxxEMC-5A After a program is written into an AH Motion Controller series CPU, the ERROR LED indicator will blink and an error flag will be ON if an error occurs in main program or amotion subroutine. The reason for the error occurring in the main program or amotion subroutine may be that the use of operands (devices) is incorrect, syntax is incorrect, or the setting of motion parameters is incorrect. You can know the reasons for the errors occurring in an AH Motion Controller series CPU by means of the error codes (hexadecimal codes) stored in error registers. Error flags and registers:
9_ 9-7 Mode LED indicator Description System status of the CPU module ON: The external input/output is forced ON/OFF. OFF: The system is in the default status. Blinking: The CPU module is being reset./The retained values in the devices are being cleared . SYSTEM Module Operating status of the motion CPU functioning as a motion module ON: The user program is being executed. OFF: The execution of the user program stops. Blinking: The motion module runs in debug mode. RUN Error status of the motion CPU functioning as a motion module ON: A serious error occurs in the module. OFF: The system is normal. Blinking: A slight error occurs in the module. ERROR Program error Motion error SM*:
Special auxiliary relay mn=10~41 SR*: Special data register POU (10: 1st axis; 41: 32nd axis) Error flag - AMmn49 Operation error SM0 - The operation error is locked SM1 - Syntax (Instruction/Operand) SM5 - check error Operation error code SR0 - Operation error address SR1/SR2 - (step) Syntax check error code SR4 ARmn41 Syntax check error address SR5/SR6 - (step)