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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
SB01E0
(480)
Network type consistency
check
Indicates whether there is a mismatch between the network
types of the control station and normal stations on the network.
• When the control station is in the MELSECNET/H Extended
mode
Off: All normal stations are set to the MELSECNET/H
Extended mode.
On: There is a normal station set to the MELSECNET/H
mode or MELSECNET/10 mode.
• When the control station is in the MELSECNET/H mode or
MELSECNET/10 mode
Off: All normal stations are set to the MELSECNET/H mode
or MELSECNET/10 mode.
On: There is a normal station set to the MELSECNET/H
Extended mode.
When a mismatch is found, the status of each station can be
checked by Network type consistency check (SW01E0 to
SW01E3).
Depending on the timing of the link refresh, Network type
consistency check (SW01E0 to SW01E3) and the update may
be offset by one sequence scan.
3
SB01F4
(500)
Redundant system status
(1)
Indicates the operation mode of each station's CPU.
Off: CPUs of all stations in backup mode
On: Separate mode
(excluding reserved stations and stations of the number
exceeding the maximum)
In the separate mode, the status of each station can be checked
by Redundant system status (1) (SW01F4 to SW01F7).
Depending on the timing of the link refresh, Redundant system
status (1) (SW01F4 to SW01F7) and the update may be offset
by one sequence scan.
3
SB01F8
(504)
Redundant system status
(2)
Indicates the pairing setting status of each station.
Off: No pairing setting
On: Pairing set station exists
(excluding stations of the number exceeding the maximum)
When a pairing set station exists, the status of each station can
be checked by Redundant system status (2) (SW01F8 to
SW01FB).
Depending on the timing of the link refresh, Redundant system
status (2) (SW01F8 to SW01FB) and the update may be offset
by one sequence scan.
3
SB01FC
(508)
Redundant system status
(3)
Indicates the operation status of each station's CPU (control
system/standby system).
Off: Control system CPUs on all stations
On: Standby system CPU exists
(excluding reserved stations and stations after the maximum
station number)
When a standby system CPU exists, the status of each station
can be checked by Redundant system status (3) (SW01FC to
SW01FF).
Depending on the timing of the link refresh, Redundant system
status (3) (SW01FC to SW01FF) and the update may be offset
by one sequence scan.
3: Valid only when SB0047 is off. When it turns on (error), the last data are retained.