Mitsubishi Electric MELSEC iQ-F FX5 - APPENDIX; Appendix 1 Special Relay List; Diagnostic information

APPX
Appendix 1 Special Relay List
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APPENDIX
Appendix 1 Special Relay List
The following table shows items in the list for special relays (SM).
Diagnostic information
The special relays for diagnostic information are shown below.
Item Description
No. Special relay number
Name Special relay name
Description Data stored in the special relay and its meaning
Compatible CPU module Shows CPU modules that support the special relay. The support status is represented by the following symbols.
• : Supported
• : Not supported
R/W The following symbols show whether the special relay can be read/written.
•R: Read-only
• W: Write-only
• R/W: Read/Write
No. Name Description Compatible CPU module R/W
FX5S FX5UJ FX5U/
FX5UC
SM0 Latest self diagnostics error (including
annunciator ON)
OFF: No error
ON: Error
R
SM1 Latest self diagnostics error (not including
annunciator On)
OFF: No self-diagnosis errors
ON: Self-diagnosis error
R
SM50 Error reset OFFON: Error reset request
ONOFF: Error reset completion
R/W
SM51 Battery low latch OFF: Normal
ON: Battery low
R
SM52 Battery low OFF: Normal
ON: Battery low
R
SM53 AC/DC DOWN OFF: No AC/DC down detection
ON: AC/DC down is detected
R
SM56 Instruction execution fault OFF: Normal
ON: Operation error
R
SM61 I/O module verify error OFF: Normal
ON: Error
R
SM62 Annunciator OFF: Not detected
ON: Detected
R
SM80 Detailed information 1: Flag in use OFF: Not used
ON: In use
R
SM112 Detailed information 2: Flag in use OFF: Not used
ON: In use
R