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8 PROGRAMMING
MELSEC-QnA
Table 8.1 Link special relay list (continued)
Availability
(
: available,
: not available )
Online
Number Name Description
Master
station
Local
station
Offline
SB0020 1 Module status
Stores the status of communications between the master/local module
and the CPU module.
OFF : Normal
ON : Error
SB0030 2
Communication instruction
(1) acceptance
Indicates the acceptance status of SEND/RECV/READ/WRITE/REQ
instructions (when channel 1 is used).(Usable on AJ61QBT11 and
A1SJ61QBT11)
OFF : Not accepted
ON : Accepted
SB0031 2
Communication instruction
(1) complete
Indicates the complete status of SEND/RECV/READ/WRITE/REQ
instructions (when channel 1 is used). (Usable on AJ61QBT11 and
A1SJ61QBT11)
OFF : Not completed
ON : Completed
SB0032 2
Communication instruction
(2) acceptance
Indicates the acceptance status of SEND/RECV/READ/WRITE/REQ
instructions (when channel 2 is used). (Usable on AJ61QBT11 and
A1SJ61QBT11)
OFF : Not accepted
ON : Accepted
SB0033 2
Communication instruction
(2) complete
Indicates the complete status of SEND/RECV/READ/WRITE/REQ
instructions (when channel 2 is used). (Usable on AJ61QBT11 and
A1SJ61QBT11)
OFF : Not completed
ON : Completed
SB0040
Data link restart
acceptance
Indicates data link restart specification acceptance status.
OFF : Not accepted
ON : Startup specification accepted
SB0041 Data link restart complete
Indicates data link restart specification acceptance complete status.
OFF : Not complete
ON : Startup complete
SB0042 1
Master station switch data
link start acceptance
Indicates the acceptance status of data link start switch instruction from
the standby master station to the master station (Usable on the standby
master station).
OFF : Not accepted
ON : Accepted
SB0043 1
Master station switch data
link start complete
Indicates the acceptance status of data link start switch instruction from
the standby master station to the master station (Usable on the standby
master station).
OFF : Not Instruction
ON : Completed
SB0044 Data link stop acceptance
Indicates data link stop specification acceptance status.
OFF : Not accepted
ON : Stop specification accepted
SB0045 Data link stop complete
Indicates data link stop specification acceptance complete status.
OFF : Not complete
ON : Stop complete
SB0048 1
Temporary error invalid
station acceptance
Indicates the acceptance status of the temporary error invalid station
request instruction.
OFF : Not accepted
ON : Accepted
SB0049 1
Temporary error invalid
station complete status
Indicates the acceptance complete status of the temporary error invalid
station request instruction.
OFF : Not executed
ON : Temporary error invalid station confirmed
SB004A 1
Temporary error invalid
station cancelling
acceptance status
Indicates the acceptance status of the temporary error invalid station
cancelling request instruction.
OFF : Not executed
ON : Instruction accepted
SB004B 1
Temporary error invalid
station cancelling
complete status
Indicates the acceptance complete status of the temporary error invalid
station cancelling request instruction.
OFF : Not executed
ON : Temporary error invalid station cancelling complete
1: Link special relay added to the
function
version B or later
2: Link special relay added to the
software
version J or later