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APPX
Appendix 3 Link Special Relay (SB) List
Appendix 3
Link Special Relay (SB) List
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
Description
Availability
Master
station
Local
station
SB0000
Link start (own
station)
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.
SB0001
Link stop (own
station)
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.
SB0002
System link start
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.
SB0003
System link stop
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.
SB0006
Clear communication
error count
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
SB0009
Event count clear
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.)
SB0010
Temporary error
invalid request
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
Summary of Contents for MELSEC Q80BD-J71GF11-T2
Page 2: ......
Page 6: ...4 Disposal Precautions CAUTION When disposing of this product treat it as industrial waste ...
Page 118: ...116 12 MONITORING MEMO ...
Page 140: ...138 14 MELSEC DATA LINK LIBRARY MEMO ...
Page 142: ...140 15 PROGRAMMING 15 1 Precautions on Programming MEMO ...
Page 243: ...241 I U Utility 83 ...
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