Link Special Relay/Register (Sb/Sw); Link Special Relay (Sb) - Mitsubishi A1SJ61BT11 User Manual

8 PROGRAMMING

8.4 Link Special Relay/Register (SB/SW)

8.4.1 Link special relay (SB)

Number Name
SB0000 Data link restart
Master station switching
SB0001 1
data link start
SB0002 Data link stop
Temporary error invalid
SB0004 1
station request
Temporary error invalid
SB0005 1
station canceling request
SB0008 1 Line test request
Parameter setting test
SB0009 1
request
SB0020 1 Module status
1: Link special relay added to the function version B or later
The data link status can be checked with bit data (link special relay SB) and word data
(link special register SW).
The SB and SW show the information on the buffer memories of the master and local
modules for convenience. The information can be read and writtten for use with
FROM/TO commands.
Link special relay (SB)...................Buffer memory address 5E0
Link special register (SW) .............Buffer memory address 600
Refer to Section 3.5.2 (4) for correspondence with buffer memory.
Table 8.1 Link special relay list
When parameter data change is not made to the data link which was
stopped by SB0002, restart it with this signal. (If you have changed
parameter data during a data link stop, turn on Yn6 and Yn8 to
restart a data link.)
OFF : No restart specification
ON : Restart specification
The output information is switched from the standby master station to
the master station to start the data link (Usable in standby master
station).
OFF : No switch command
ON : Switch command
Stops the host station's data link.
However, when the master station executes this, the entire system
stops.
OFF : No stop specification
ON : Stop specified
Confirms the station which had been specified by SW0003 to
SW0007 to temporary error invalid station.
OFF : No request
ON : Request
Cancels the station which had been specified by SW0003 to
SW0007 from temporary error invalid station.
OFF : No request
ON : Request
Performs the line test to station which had been specified by
SW0008.
OFF : No request
ON : Request
Reads the parameter setting information for actual system
configuration.
OFF : Requested
ON : Not requested
Indicates the buffer access status.
OFF : No request
ON : Request
Description
8 - 12
MELSEC-A
to 5FF
H H
to 7FF
H H
Availability
( : available,
: not available )
Online
Offline
Master Local
station station