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APPENDICES
Appendix 1 Error Codes
When an error occurs at power-on, at switching from STOP to RUN or during RUN, the CPU module indicates the
error (LED indication and a message on a display device) by the self-diagnostic function and stores the error
information in the special relay (SM) and special register (SD).
When an error occurs at communication request from a programming tool, intelligent function module, or network
system to the CPU module, the CPU module returns the error code (4000
H
to 4FFF
H
) to the request source.
This section describes errors that may occur in the CPU module and corrective actions for the errors.
(1) How to read error code lists
The following describes how to read Appendix 1.3 Error code list (1000 to 1999) to Appendix 1.9 Error code list
(7000 to 10000).
Each list contains errors in QCPU and LCPU.
(a) Error code, common information, and individual information
The error code is stored in SD0. The common information is stored in SD5 to SD15. The individual information
is stored in SD16 to SD26.
(b) Corresponding CPU
• QCPU: All the Q series CPU modules
• Q00J/Q00/Q01: Basic model QCPU
• Qn(H): High Performance model QCPU
• QnPH: Process CPU
• QnPRH: Redundant CPU
• QnU: Universal model QCPU
• QnUDV: High-speed Universal model QCPU
• Q00UJ/Q00U/Q01U: Q00UJCPU, Q00UCPU, and Q01UCPU
• LCPU: All the L series CPU modules
• CPU module model: Only the specified model (Example: Q02UCPU, L26CPU-BT)
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