Mitsubishi Electric QJ71LP21 Reference Manual page 314

APPENDIX
No. Name
SB00AD
Offline test completion
(173)
SB00AE Offline testing
(174) Response designation
SB00AF Offline testing
(175) Response end
SB00EE
Transient error
(238)
3 Remote sub-master
SB01C4 station switching
(452) acceptance status
3
Remote sub-master
SB01C5
station switching status
(453)
3 Send/receive device
SB01C8 number valid/invalid
(456) status
3
Redundant system status
SB01F4
(1)
(500)
3
Redundant system status
SB01F8
(2)
(504)
3
Redundant system status
SB01FC
(3)
(508)
3: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
App - 10
Table 1 Special link relay (SB) list (Continued)
Description
Indicates the offline test completion status.
Off: Not completed
On: Completed
Indicates the response status for offline test.
Off: No response
On: Response
Indicates the response status for offline test end.
Off: No response end
On: Response end
Indicates the transient transmission error status.
Off: No error
On: Errors exist
Indicates the status of accepting the directive to shift from master
operation to sub-master operation.
Off: Without acceptance
On: With acceptance
Indicates the operation status of a shift from master operation to
sub-master operation.
Off: Without shift
On: Shift completion
Indicates whether the send/receive device numbers (SW01C8 to
SW01CF) of the remote master station or remote sub-master
station are valid or invalid.
Off: Invalid
On: Valid
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)
This relay turns off when all of SW01F4 to SW01F7 are "0."
Indicates the pairing setting status of each station.
Off: No pairing setting
On: Pairing set station exists
This relay turns off when all of SW01F8 to SW01FB are "0."
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)
This relay turns off when all of SW01FC to SW01FF are "0."
MELSEC-Q
Use permitted/prohibited
Remote
Control Normal
master
station station
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
Remote I/O
station
App - 10