APPX
Appendix 4 List of Link Special Relay (SB)
307
A
SB0119 Redundant CPU system status of
master station
Stores the redundant CPU system status (control/standby system)
of the master station (master operating station).
Off: Control system
On: Standby system
This relay is turned off for a station other than a redundant system
station.
(Conditions)
• This relay is enabled when 'Baton pass status of own station'
(SB0047) is off.
SB011A Redundant CPU system status of
station No.0
Stores the redundant CPU system status (control/standby system)
of the station No.0.
Off: Control system
On: Standby system
This relay is turned off for a station other than a redundant system
station.
(Conditions)
• This relay is enabled when the submaster function is used.
SB011F CPU minor error status of station
No.0
Stores the minor error occurrence status of the CPU module on the
station No.0.
Off: No minor errors, or a moderate/major error being occurred
On: Minor error
(Conditions)
• This relay is enabled when the submaster function is used.
SB0120 PORT1 current error frame
reception status (1)
Stores if a receive frame error line status caution level is currently
occurring in the P1 side of each station.
Off: A receive frame error line status caution level is not occurring
in any stations.
On: A receive frame error line status caution level is occurring in
one or more stations.
If a receive frame error line status caution level is occurring, the
status of each station can be checked with 'PORT1 current error
frame reception status of each station (1)' (SW0120 to SW0127).
Depending on the link refresh timing, the update of 'PORT1 current
error frame reception status of each station (1)' (SW0120 to
SW0127) may be offset by one sequence scan.
(Conditions)
• This relay is enabled when 'Baton pass status of own station'
(SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on,
data prior to error is held.
SB0121 PORT1 current error frame
reception status of master station
Stores whether the error frame is currently received at the P1 side
of the master station (master operating station).
Off: Not received
On: Currently receiving
(Conditions)
• This relay is enabled when 'Baton pass status of own station'
(SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on,
data prior to error is held.
SB0128 PORT1 current error frame
reception status (2)
Stores if a receive frame error line status warning level is currently
occurring in the P1 side of each station.
Off: A receive frame error line status warning level is not occurring
in any stations.
On: A receive frame error line status warning level is occurring in
one or more stations.
If a receive frame error line status warning level is occurring, the
status of each station can be checked with 'PORT1 current error
frame reception status of each station (2)' (SW0128 to SW012F).
Depending on the link refresh timing, the update of 'PORT1 current
error frame reception status of each station (2)' (SW0128 to
SW012F) may be offset by one sequence scan.
(Conditions)
• This relay is enabled when 'Baton pass status of own station'
(SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on,
data prior to error is held.
No. Name Description Availability
Master station
(submaster
station)
Local station
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