Appendix 4 List Of Link Special Relay (Sb) Areas - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 4
The link special relay (SB) is turned on/off depending on various factors during data link. Any error status of the data link can
be checked by using and monitoring it in the program.
Application of the link special relay (SB)
By using the link special relay (SB), the status of CC-Link system can be checked from HMI (Human Machine Interfaces) as
well as the engineering tool.
Refresh of the link special relay (SB)
To use the link special relay (SB), set them in "Link Refresh Settings" in "Basic Settings" so that they are refreshed to the
devices or labels of the CPU module. ( Page 62 Link Refresh Settings)
Ranges turned on/off by users and by the system
The following ranges correspond to when the link special relay (SB) areas are assigned from SB0000 to SB01FF.
• Turned on/off by users: SB0000 to SB001F
• Turned on/off by the system: SB0020 to SB01FF
List of link special relay (SB) areas
The following table lists the link special relay (SB) areas when they are assigned from SB0000 to SB01FF.
When a standby master station is used, refer to the respective columns under "Availability" in the table as explained below.
• When a standby master station is operating as a master station: "Master station" column
• When a standby master station is operating as a standby master station: "Local station" column
Do not turn on or off areas whose numbers are not on the following list or ranges turned on/off by the system.
Doing so may cause malfunction of the programmable controller system.
No. Name
SB0000 Data link restart
SB0001 Refresh instruction at
standby master
switching
SB0002 Data link stop
SB0003 Refresh instruction
when changing
parameters by the
dedicated instruction
SB0004 Temporary error invalid
request
SB0005 Temporary error invalid
cancel request
APPX
152

Appendix 4 List of Link Special Relay (SB) Areas

List of Link Special Relay (SB) Areas
Description
Restarts the data link that has been stopped by SB0002.
Off: Not instructed
On: Instructed
Refreshes cyclic data after data link control is transferred to the standby
master station.
Off: Not instructed
On: Instructed
Stops the data link of the own station.
Note that if this relay is instructed to the master station, the entire system
will stop.
Off: Not instructed
On: Instructed
Refreshes cyclic data after parameter setting is changed by the RLPASET
instruction.
Off: Not instructed (refresh stopped)
On: Instructed (refresh started/continued)
Determines the stations specified by SW0003 to SW0007 as a temporary
error invalid station.
Off: Not requested
On: Requested
Cancels the temporary error invalid station setting configured for the
stations specified by SW0003 to SW0007.
Off: Not requested
On: Requested
Availability (: Available, : Not
available)
Online Offline
Master Local
station station
  
  
  
  
  
  