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APPENDIX
Appendix 1 Special Relay List
APPENDIX
Appendix 1 Special Relay List
Diagnostic information
The special relays for diagnostic information are shown below.
R: Read only, R/W: Read/Write
System information
The special relays for system information are shown below.
R: Read only, R/W: Read/Write
System clock
The special relay about system clock is shown below.
R: Read only, R/W: Read/Write
No. Name Description R/W
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 OFFON: Error reset request
ONOFF: 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
No. Name Description R/W
SM203 STOP contact OFF: Other than STOP state
ON: STOP state
R
SM204 PAUSE contact OFF: Other than PAUSE state
ON: PAUSE state
R
SM210 Clock data set request OFFON: Set Request
ONOFF: Set completed
R/W
SM211 Clock data set error OFF: No error
ON: Error
R
SM213 Clock data read request OFF: Ignored
ON: Read request
R/W
No. Name Description R/W
SM400 Always ON R
ON
OFF