Mitsubishi Electric MELSEC iQ-R Series User Manual page 158

No. Name
SB007A Standby master station
operation history of
own station
SB007B Master/standby master
operation status of
own station
SB007C Slave station refresh/
compulsory clear
setting status in case
of programmable
controller CPU STOP
SB0080 Data link status of
other stations
SB0081 Watchdog timer error
status of other stations
SB0082 Fuse blown status of
other stations
SB0083 Switch change status
of other stations
SB0090 Line status of own
station
SB0094 Transient transmission
status
SB0095 Master stations
transient transmission
status
SB00B4 Standby master station
test result
SB0160 Remote register use
prohibited status
SB0184 Transmission speed
test result of standby
master station
APPX
156
Appendix 4 List of Link Special Relay (SB) Areas
Description
Stores whether the own station has ever operated as a standby master
station.
Off: Has no history of operating as a standby master station
On: Has a history of operating as a standby master station
Stores whether the own station is operating as a master station or standby
master station.
Off:The own station is operating as a master station.
On:The own station is operating as a standby master station.
Stores the parameter setting status of output data at CPU STOP.
Off: Receives remote output (RY).
On: Sends 0 data.
Stores the communication status with slave stations.
Off: All stations normal
On: Faulty station found (The faulty station number is stored in SW0080
to SW0083.)
It takes maximum of six seconds for 'Data link status of other stations'
(SB0080) to turn on after a slave station connected to the master station or
local station becomes faulty.
Stores whether a watchdog timer error has occurred in other stations.
Off: No error
On: Error
Depending on the link refresh timing, SB0081 may be updated with the
time difference of one sequence scan from the update of 'Watchdog timer
error occurrence status of other stations' (SW0084 to SW0087).
Stores whether a fuse blown error has occurred in other stations. (SW0088
to SW008B)
Off: No error
On: Error
Depending on the link refresh timing, SB0082 may be updated with the
time difference of one sequence scan from the update of 'Fuse blown
status of other stations' (SW0088 to SW008B).
Detects whether the setting of setting switches of other stations during data
link has been changed.
Off: No change
On: Changed
Depending on the link refresh timing, SB0083 may be updated with the
time difference of one sequence scan from the update of 'Switch change
status of other stations' (SW008C to SW008F).
Stores whether the line to the own station is normally operating.
Off: Normal
On: Error (disconnected)
Stores whether a transient transmission error has occurred.
Off: No error
On: Error
Stores whether the master station is normally performing transient
transmission.
Off: Normal
On: Error
Stores the result of the line test 1.
Off: Normal
On: Error
Stores whether the use of the remote register is prohibited.
Off: Available
On: Use prohibited
Stores the result of the transmission speed test to the standby master
station.
Off: Normal (same transmission speed as the master station) or no
response from the module
On: Error (different transmission speed from the master station)
Availability (: Available, : Not
available)
Online Offline
Master Local
station station
  
  
  
  
  
  
  
  
  
  
  
  
  