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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
3
SB0095
(149)
Reverse loop status
Indicates the status of stations connected to the reverse loop.
Off: All stations normal
On: Faulty stations exist
When any faulty station exists, the status of each station can be
checked in Reverse loop status of each station (SW0095 to
SW0098).
Depending on the timing of the link refresh, Reverse loop status
of each station (SW0095 to SW0098) and the update may be
offset by one sequence scan.
3
SB0096
(150)
Reverse loop status of
remote master station
Indicates the reverse loop status of the remote master station.
Off: Normal
On: Error
3
SB0099
(153)
Forward loop loopback
Indicates the loopback status of the forward loop while the
system is operating.
Off: Not executed
On: Executing stations exist
(Executing stations are stored in the SW0099)
3
SB009A
(154)
Reverse loop loopback
Indicates the loopback status of the reverse loop while the
system is operating.
Off: Not executed
On: Executing stations exist
(Executing stations are stored in the SW009A)
3
SB009C
(156)
Send transmission path
mismatch status
Indicates the status of the transmission path used for sending by
other stations.
Off: All matched
On: Mismatching stations exist
Depending on the timing of the link refresh, Loop usage status of
each station (SW009C to SW009F) and the update may be
offset by one sequence scan.
6
3
SB00A0
(160)
RECV instruction
execution request flag (1)
Stores the data reception status of channel 1 of the host station.
Off: No data reception
On: Data received
3
SB00A1
(161)
RECV instruction
execution request flag (2)
Stores the data reception status of channel 2 of the host station.
Off: No data reception
On: Data received
3
SB00A2
(162)
RECV instruction
execution request flag (3)
Stores the data reception status of channel 3 of the host station.
Off: No data reception
On: Data received
3
SB00A3
(163)
RECV instruction
execution request flag (4)
Stores the data reception status of channel 4 of the host station.
Off: No data reception
On: Data received
3
SB00A4
(164)
RECV instruction
execution request flag (5)
Stores the data reception status of channel 5 of the host station.
Off: No data reception
On: Data received
3
SB00A5
(165)
RECV instruction
execution request flag (6)
Stores the data reception status of channel 6 of the host station.
Off: No data reception
On: Data received
3
SB00A6
(166)
RECV instruction
execution request flag (7)
Stores the data reception status of channel 7 of the host station.
Off: No data reception
On: Data received
3
SB00A7
(167)
RECV instruction
execution request flag (8)
Stores the data reception status of channel 8 of the host station.
Off: No data reception
On: Data received
SB00A8
(168)
Online test instruction
Indicates the online test instruction status.
Off: Not instructed
On: Instructed
3: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
6: Available only in the remote sub-master station.