Mitsubishi MELSEC QS Series Programming Manual page 212

(5) Boot operation
Number Name
SM660 Boot operation
(6) Instruction-Related Special Relays
Number Name
BIN/DBIN
SM722 instruction error
disabling flag
(7) CC-Link Safety
Number Name
Safety station
refresh
communication
SM1004
status
(Safety master
module 1)
Safety station
refresh
communication
SM1204
status
(Safety master
module 2)
App-14
Appendix 2 SPECIAL RELAY LIST
TableApp.2.6 Special relay
Meaning
(On the TEST MODE)
• Turns ON during the boot operation from
OFF : Program memory
standard ROM.
execution
• Turns OFF when the boot operation from
ON : During boot
standard ROM is not run.
operation
(On the SAFETY MODE)
• Always ON
TableApp.2.7 Special relay
Meaning
OFF : Error detection
performed • Turned ON when "OPERATION ERROR" is
ON : Error detection not suppressed for BIN or DBIN instruction.
performed
TableApp.2.8 Special relay
Meaning
OFF : Nomal The safety station refresh communication
ON : Communication atatus is stored. (The status of each station are
error stored in SD1004 to SD1007.)
OFF : Nomal The safety station refresh communication
ON : Communication status is stored. (The status of each station are
error stored in SD1204 to SD1207.)
Explanation
Explanation
Explanation
Set by Corresponding
(When Set) CPU
S (Initial) QS
Set by Corresponding
(When Set) CPU
U QS
Set by Corresponding
(When Set) CPU
S (Status change)
QS
S (Status change)