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MELSEC-Q
APPENDICES
Table 2 Link special relay (SB) list (Continued)
No. Name Description
Availability
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
SB0064
(100)
Reserved station
designation
Indicates whether or not the station is reserved. (Valid when the
SB0049 is off.)
Off: No reserved station
On: Reserved station exists
If a reserved station is found, the status of each station can be
checked by Reserved station designation (SW0064 to SW0067).
Depending on the timing of the link refresh, Reserved station
designation (SW0064 to SW0067) and the update may be offset
by one sequence scan.
SB0068
(104)
Communication mode
Indicates the link scan mode (status of supplementary settings of
the common parameters).
(Valid when the SB0049 is off.)
Off: Normal mode
On: Constant scan mode
SB0069
(105)
Multiplex transmission
designation
Indicates the transmission designation status (status of
supplementary settings of the common parameters).
(Valid when the SB0049 is off.)
Off: Normal transmission designation
On: Multiplex transmission designation
3
SB006A
(106)
Multiplex transmission
status
Indicates the transmission status.
Off: Normal transmission
On: Multiplex transmission
In the case of multiplex transmission, the status of each station
can be checked in Multiplex transmission status (1) (SW00B0 to
SW00B3) and (2) (SW00B4 to SW00B7).
3
SB006B
(107)
Multiplex remote function
designation
Indicates the status of designating the multiplex remote function.
Off: Not designated.
On: Designated.
3
SB0070
(112)
Baton pass status of each
station
Indicates the baton pass status of each station. (Not applicable to
reserved stations and the station with the maximum station
number or higher)
Off: All stations normal
On: Faulty station exists
When any faulty station exists, each station status can be
checked in Baton pass status of each station (SW0070 to
SW0073).
Depending on the timing of the link refresh, Baton pass status of
each station (SW0070 to SW0073) and the update may be offset
by one sequence scan.
3
SB0071
(113)
Baton pass status of the
remote master station
Indicates the baton pass status of the master station. (Including
when there is an online loop test.)
Off: Master station baton pass normal.
On: Master station baton pass error.
3
SB0072
(114)
Remote sub-master
station transient
transmission status
Indicates the transient transmission status of the remote sub-
master station.
Off: Normal
On: Abnormal
3
SB0074
(116)
Cyclic transmission status
of each station
Indicates the cyclic transmission status of each station. (Not
applicable to reserved stations and the station with the maximum
station number or higher)
Off: All stations are executing data linking
On: Stations that are not executing data linking exist
When any non-executing station exists, each station status can
be checked in Cyclic transmission status of each station
(SW0074 to SW0077).
Depending on the timing of the link refresh, Cyclic transmission
status of each station (SW0074 to SW0077) and the update may
be offset by one sequence scan.
3
SB0075
(117)
Cyclic transmission status
of the remote master
station
Indicates the master station cyclic transmission status. (Includes
online loop test.)
Off: Master station cyclic transmission normal.
On: Master station cyclic transmission error.
3: Valid only when SB0047 is off. When it turns on (error), the last data are retained.