Appendix 6 List Of Special Relays - Mitsubishi Electric MELSEC Q Series User Manual

Appendix 6
The special relay (SM) is an internal relay whose application is fixed in a C Controller module.
The special relay cannot be used in the same way as other internal relays are used in user programs.
Item
Number
Name
Description
Detailed
description
Setting side
(setting time)
(1) Diagnostic information
Number Name
SM0 Diagnostic error
Self-diagnostic
SM1
error
Common error
SM5
information
Error individual
SM16
information
AC/DC DOWN
SM53
detection
Fuse blown
SM60
detection
I/O module
SM61
verification error
478
List of Special Relays
Indicates the number of the special relay.
Indicates the name of the special relay.
Indicates descriptions about the special relay.
Indicates detailed descriptions about the special relay.
Explains setting side and setting time at the system side.
• Setting side
S : Set at the system side.
• Setting time
Error
: Set when an error occurs.
occurrence
System : Set when a fixed scan or the status is changed at the system side.
Description
OFF: No error
ON: Error
OFF: No self-diagnostic error
ON: Self-diagnostic error
OFF: No common error
information
ON: Common error
information
OFF: No error individual
information
ON: Error individual
information
OFF: Without AC/DC
DOWN
ON: With AC/DC DOWN
OFF: Normal
ON: Fuse blown module
OFF: Normal
ON: Error
Description
Detailed description
• Turns on when a diagnostic result error occurs.
Later, on status is held even after returning to normal.
• Turns on when a diagnostic result error occurs.
Later, on status is held even after returning to normal.
• When SM0 turns on, the relay turns on if there is
common error information.
• When SM0 turns on, the relay turns on if there is error
individual information.
• Turned on when a momentary power failure for 20ms or
less occurs if the AC power supply module is used.
Reset when a power cycle is performed.
• Turns on when more than one output module in fuse
blown status exist.
Later, on status is held even after returning to normal.
• Turns on when the I/O module is different from the
status that was registered upon power on.
Later, on status is held even after returning to normal.
Setting side
(setting time)
S
(Error)
S
(Error)
S
(Error)
S
(Error)
S
(Error)
S
(Error)
S
(Error)