Mitsubishi Electric MELSEC iQ-R Series User Manual page 277

No. Name
*2
SM243 CPU No.4 reset flag
*1 These relays are used as an interlock to access each CPU when the multiple CPU synchronization setting is configured with
asynchronous mode.
*2 When the target CPU is the MELSECWinCPU module, replace terms as follows:
Resetting: Hardware reset or bus reset
Being reset: Bus being reset
*3 When the target CPU is a MELSECWinCPU module, the relay turns ON at the timing when the bus control operates. (The operating
status of Windows is not included.)
Special relay for a MELSECWinCPU module
The special relay for this product is as follow:
No. Name
SM680 INFORMATION LED ON/
OFF instruction
Description Details
OFF: CPU No.4 not being • This relay turns OFF when the CPU No.4 is not being
reset reset.
ON: CPU No.4 being • This relay turns ON while the CPU No.4 is being reset
reset (including the case when the CPU module is removed
from the base unit). Errors occur in the other CPU
modules.
Description Details
OFFON: ON/OFF The INFORMATION LED turns ON or OFF depending on
instruction send the ON/OFF status of SD680 when this relay turns from
OFFON: ON/OFF OFF to ON. (Execute the operation while SM680 is OFF.)
instruction completed When turning ON this relay and then OFF within the
refresh cycle of the fixed cycle processing function, the
INFORMATION LED does not turn ON or OFF.
Set by (when to set)
S (status change)
Set by (when to set)
U/S (status change)
APPX
Appendix 4 Special Relay List
A
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