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MELSEC-Q
APPENDICES
Table 3 Link special register (SW) list (Continued)
No. Name Description
Availability
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
9
SW00EE
(238)
Transient transmission
error
Accumulates and stores the number of transient transmission
errors.
Other than 0: Number of errors
Turning ON Clear transient transmission errors (SB000A) clears
the stored value.
9
SW00EF
(239)
Transient transmission
error pointer
Stores the pointer that sets the data for the next transient
transmission error.
Turning ON Clear transient transmission errors (SB000A) clears
the stored value.
2
SW00F0
(240)
to
SW00FF
(255)
Transient transmission
error history
Stores the error codes of the transient transmission errors
(refer to the error codes in Section 8.3).
2
SW01C4
(452)
Remote sub-master
station switching result
Stores the result of a shift from master operation to sub-master
operation.
0 : Normal completion
1 or later : Abnormal completion (refer to Section 8.3 for
error codes)
2
SW01C8
(456)
Send LY device number
(Valid only when SB01C8 is ON)
For remote master station : The send LY device number to
the remote sub-master station is
stored. In 1 point units.
For remote sub-master station : The send LY device number to
the remote master station is
stored. In 1 point units.
2
SW01C9
(457)
Receive LX device
number
(Valid only when SB01C8 is ON)
For remote master station : The receive LX device number
from the remote sub-master
station is stored. In 1 point units.
For remote sub-master station : The receive LX device number
from the remote master station is
stored. In 1 point units.
2
SW01CC
(460)
Send LB device number
(Valid only when SB01C8 is ON)
For remote master station : The send LB device number to
the remote sub-master station is
stored. In 1 point units.
For remote sub-master station : The send LB device number to
the remote master station is
stored. In 1 point units.
2
SW01CD
(461)
Receive LB device
number
(Valid only when SB01C8 is ON)
For remote master station : The receive LB device number
from the remote sub-master
station is stored. In 1 point units.
For remote sub-master station : The receive LB device number
from the remote master station is
stored. In 1 point units.
2
SW01CE
(462)
Send LW device
number
(Valid only when SB01C8 is ON)
For remote master station : The send LW device number to
the remote sub-master station is
stored. In 1 point units.
For remote sub-master station : The send LW device number to
the remote master station is
stored. In 1 point units.
2
SW01CF
(463)
Receive LW device
number
(Valid only when SB01C8 is ON)
For remote master station : The receive LW device number
from the remote sub-master
station is stored. In 1 point units.
For remote sub-master station : The receive LW device number
from the remote master station is
stored. In 1 point units.
2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
9: To reset the SW00EE to SW00EF, turn on the SB000A.