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Appendix 3.1
Link special relays SB0000 to SB001F are turned ON/OFF by the program, and SB0020 to SB01FF are turned
ON/OFF by the L series master/local module.
The numeric values in parentheses in the Number column indicate addresses and bit positions of the buffer memory.
Example: For buffer memory address 5E0
When a standby master station is used as a standby master station, 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
For the correspondence with the buffer memory, refer to
Do not turn ON/OFF the area of the No. which does not exist in the link special relay (SB) list.
Turning ON/OFF the area of the No. which does not exist in the list may cause malfunction of the programmable controller
system.
The following table lists the link special relays.
Number
Name
SB0000
Data link restart
(5E0
, b0)
H
SB0001
Refresh instruction at
(5E0
, b1)
standby master switching
H
SB0002
Data link stop
(5E0
, b2)
H
Refresh instruction when
SB0003
changing parameters by
(5E0
, b3)
H
the dedicated instruction
SB0004
Temporary error invalid
(5E0
, b4)
request
H
SB0005
Temporary error invalid
(5E0
, b5)
canceling request
H
SB0007
Master station duplication
(5E0
, b7)
error canceling request
H
SB0008
Loop test request
(5E0
, b8)
H
410
Link special relays (SB)
H
Description
Restarts the data link that had been stopped by SB0002.
OFF: Restart not instructed
ON: Restart instructed
Instructs to perform cyclic data refresh after the data link control is
transferred to the standby master station.
OFF: Not instructed
ON: Instructed
Stops the host data link.
However, when the master station executes this, the entire system
will stop.
OFF: No stop instruction
ON: Stop instructed
Instructs to refresh cyclic data after changing parameters by the
G(P).RLPASET instruction.
OFF: Not instructed (stop refreshing)
ON: Instructed (start/continue refreshing)
Establishes the stations specified by SW0003 to SW0007 as
temporary error invalid stations.
OFF: Not requested
ON: Requested
Cancels the temporary error invalid status of stations specified by
SW0003 to SW0007.
OFF: Not requested
ON: Requested
Instructs to cancel master station duplication error.
OFF: Not instructed
ON: Instructed
Executes loop tests for the stations specified by SW0008.
OFF: Not requested
ON: Requested
and bit 0: (5E0
,b0)
H
Page 402, Appendix 2 (5).
Availability
(: Available, : Not available)
Online
Offline
Master
Local
station
station
*4
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