Specifications

9. Troubleshooting and Fault Information
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9-2
Ϩʳ Output Point LED Indication
Output LED indicates if the output signals are ON or OFF. Please check the following items when the LED ON/OFF
indication does not correspond to the commands.
 Output contacts may be melted and stuck together due to a short circuit or current overload.
 Check wiring and verify screws are tight.
 Fault Codesʳ
If the ERROR LED is flashing, the problem may be an invalid commands, communication error, invalid operation, or
missing instructions, error indication is given by self-checking function and corresponding error code and error step are
stored in special registers. This section gives description of cause and corrective action for each error.
If an error occurred, corresponding error codes can be read from the PC or HPP. The following table shows the error
messages, description and cause of error. Error codes and error steps are stored in the following special registers.
Error code : D1004
Error step : D1137
Fault
Code
Description
Fault
Code
Description
0001 Operand bit device S exceeds the usage range 0604 Operand word device T register usage exceeds limit
0002 Label P exceeds the usage range or duplicated 0801 Operand bit device M exceeds the usage range
0003 Operand KnSm exceeds the usage range 0803 Operand KnMm exceeds the usage range
0102 Interrupt pointer I exceeds the usage range or duplicated 0D01 DECO Misuse operand
0202 Instruction MC exceeds the usage range 0D02 ENCO Misuse Operand
0302 Instruction MCR exceeds the usage range 0D03 DHSCS Misuse Operand
0401 Operand bit device X exceeds the usage range 0D04 DHSCR Misuse Operand
0403 Operand KnXm exceeds the usage range 0D05 PLSY Misuse Operand
0501 Operand bit device Y exceeds the usage range 0D06 PWM Misuse Operand
0503 Operand KnYm exceeds the usage range 0D07 FROM / TO Misuse Operand
0601 Operand bit device T exceeds the usage range 0D08 PID Misuse Operand