Appendix 3 Link Special Relays (Sbs) And Link Special Registers (Sws); Appendix 3.1 Link Special Relays (Sbs) - Mitsubishi Electric MELSEC-Q Series User Manual

Cc-link system master/local module
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Appendix 3
Data link status is indicated by bit data (link special relays (SBs)) and word data (link special registers (SWs)).
The link special relays (SBs) and link special registers (SWs) represent information stored in the buffer memory areas
of a master/local module for smooth operation. They are read to devices set as refresh devices in the network
parameter for use.
• Link special relays (SBs) ••• Buffer memory addresses: 5E0
• Link special registers (SWs) ••• Buffer memory addresses: 600
Appendix 3.1
SB0000 to SB001F are turned on/off using a program, whereas SB0020 to SB01FF are automatically turned on/off.
Values in parentheses are buffer memory addresses. (
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
Number
Name
SB0000
Data link restart
(5E0
, b0)
H
Refresh instruction at
SB0001
standby master
(5E0
, b1)
H
switching
SB0002
Data link stop
(5E0
, b2)
H
Refresh instruction
SB0003
when changing
(5E0
, b3)
parameters by the
H
dedicated instruction
SB0004
Temporary error
(5E0
, b4)
invalid request
H
Temporary error
SB0005
invalid canceling
(5E0
, b5)
H
request
Link Special Relays (SBs) and Link Special
Registers (SWs)
Link special relays (SBs)
Description
Restart the data link that has been stopped by SB0002.
OFF: Not instructed
ON: Instructed
Refresh cyclic data after data link control is transferred to
the standby master station.
OFF: Not instructed
ON: Instructed
Stop the data link of the host station.
Note that if this relay is instructed to the master station,
the entire system will stop.
OFF: Not instructed
ON: Instructed
Refresh cyclic data after parameter setting is changed by
the G(P).RLPASET instruction.
OFF: Not instructed (refresh stopped)
ON: Instructed (refresh started/continued)
Determine the stations specified by SW0003 to SW0007
as a temporary error invalid station.
OFF: Not requested
ON: Requested
Cancel the temporary error invalid station setting
configured for the stations specified by SW0003 to
SW0007.
OFF: Not requested
ON: Requested
to 5FF
H
H
to 7FF
H
H
Page 338, Appendix 2 (5))
Master
station
APPENDICES
Availability
( : Yes, ×: No)
Online
Offline
Local
station
×
×
×
×
×
×
×
×
×
343
A

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