Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual page 314

No. Name
SB01B0 Redundant system data link error
status of each station
SB01B1 Redundant system data link error
status of master station
SB01BF Redundant system data link error
status of station No.0
SB01E1 Setting status of CC-Link IE Field
Network synchronous
communication function
APPX
312
Appendix 4 List of Link Special Relay (SB)
Description
Stores the data link status of each station when the own station is
the redundant system.
Off: All stations normal
On: Faulty station exists or the own station is the standby system.
When the own station is the control station and checks that the data
link status of each station is normal in all stations the control
system, 'Redundant system data link error status of each station'
(SB01B0) is turned off (normal). (The data input from all stations is
valid.)
When this relay is turned on, the status of each station can be
checked with 'Redundant system data link status of each station'
(SW01B0 to SW01B7).
Depending on the link refresh timing, the update of 'Redundant
system data link status of each station' (SW01B0 to SW01B7) may
be offset by one sequence scan.
If the master station is powered on before slave stations, data link
may be reconfigured. During the reconfiguration (maximum three
seconds), 'Redundant system data link error status of each station'
(SB01B0) is turned on (error). Starting up the master station last can
prevent data link from being reconnected and 'Redundant system
data link error status of each station' (SB01B0) from being turned on
(error).
(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.
• Reserved stations and stations higher than the maximum station
number are ignored.
Stores the data link status of the master station (master operating
station) when the own station is the redundant system.
Off: Normal
On: Error or the own station is the standby system.
When the own station is the control system and checks that the data
link status of the master station (master operating station) is normal,
'Redundant system data link error status of master station'
(SB01B1) is turned off (normal). (The data input from the master
station (master operating station) is valid.)
(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.
Stores the data link status of station No. 0 when the own station is
the redundant system.
Off: Normal
On: Error or the own station is the standby system.
When the own station is the control system and checks that the data
link status of the station No.0 is normal, 'Redundant system data
link error status of station No.0' (SB01BF) is turned off (normal).
(The data input from the station No.0 is valid.)
(Conditions)
• This relay is enabled when the submaster function is used.
• 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.
Stores the setting status of the CC-Link IE Field Network
synchronous communication function.
Off: No setting
On: Set
Availability
Master station Local station
(submaster
station)
*2 *2
 
*2 *2
 
*2 *2
 
 (Master 
station only)