Appendix 3 Link Special Relay (Sb) List - Mitsubishi Electric MELSEC SW1DNC-CCIEF-B User Manual

Appendix 3
A link special relay (SB) is turned ON/OFF depending on various factors at data link. Any error status of the data link can be
confirmed by using and monitoring it in the program.
Application of the link special relay (SB)
By using link special relays (SB), the status of the CC-Link IE Field Network can be checked.
Ranges of areas that are turned ON/OFF by users and by the system
The following is a range when the link special relays (SB) are assigned from SB0000 to SB01FF.
Range turned ON/OFF by users: SB0000 to SB001F
Range turned ON/OFF by the system: SB0020 to SB01FF
Link special relay (SB) list
A list of link special relays (SB) when they are assigned from SB0000 to SB01FF is as follows.
Do not turn ON or OFF areas whose numbers are not on the link special relay (SB) list. Doing so may cause
malfunction of the programmable controller system.
Number Name
SB0000 Link start (own
station)
SB0001 Link stop (own
station)
SB0002 System link start
SB0003 System link stop
SB0006 Clear communication
error count
SB0009 Event count clear
SB0010 Temporary error
invalid request
APPX
188

Appendix 3 Link Special Relay (SB) List

Link Special Relay (SB) List
Description
The own station's cyclic transmission is restarted.
• OFF: No start direction
• ON: Start direction (enabled during start-up)
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• For SB0000 to SB0003, this is enabled when only one of them is turned ON.
The own station's cyclic transmission is stopped.
• OFF: No stop direction
• ON: Stop direction (enabled during start-up)
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• For SB0000 to SB0003, this is enabled when only one of them is turned ON.
Cyclic transmission of the entire system is restarted.
The station where cyclic transmission is restarted is specified by the Link stop/start
direction (SW0000 to SW0008).
• OFF: No start direction
• ON: Start direction (enabled during start-up)
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• For SB0000 to SB0003, this is enabled when only one of them is turned ON.
Cyclic transmission of the entire system is stopped.
The station where cyclic transmission is stopped is specified by the Link stop/start
direction (SW0000 to SW0008).
• OFF: No stop direction
• ON: Stop direction (enabled during start-up)
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• For SB0000 to SB0003, this is enabled when only one of them is turned ON.
Clears the link special registers for the communication error (SW0068 to SW006B,
SW0074 to SW0077, SW007C to SW007F, SW0120 to SW015F).
• OFF: No clear direction
• ON: Clear direction
This clears the Event history status (SB007A) and Event count (SW007A).
• OFF: No clear direction
• ON: Clear direction (Errors are not counted while this is ON.)
Stations specified in Reserved station function disable/temporary error invalid station
setting (SW0010 to SW0017) are set as temporary error invalid stations.
• OFF: No request
• ON: Request issued
Availability
Master Local
station station
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