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MELSEC-Q
APPENDICES
Table 2 Link special relay (SB) 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
3
SB0050
(80)
Cyclic transmission start
acknowledgment status
(system)
Indicates the startup acknowledgment status of the cyclic
transmission.
Off: Not acknowledged (SB0002 is off)
On: Start acknowledged (SB0002 is on)
3
SB0051
(81)
Cyclic transmission start
completion status
(system)
Indicates the completion status of the cyclic transmission.
Off: Not completed (SB0002 is off)
On: Start completed (SB0002 is on)
3
SB0052
(82)
Cyclic transmission stop
acknowledgment status
(system)
Indicates the stop acknowledgment status of the cyclic
transmission.
Off: Not acknowledged (SB0003 is off)
On: Stop acknowledged (SB0003 is on)
3
SB0053
(83)
Cyclic transmission stop
completion status
(system)
Indicates the stop completion status of the cyclic transmission.
Off: Not completed (SB0003 is off)
On: Stop completed (SB0003 is on)
SB0054
(84)
Parameter receive status
Indicates the parameter receive status.
Off: Receive completed
On: Not received
SB0055
(85)
Received parameter error
Indicates the status of the received parameters.
Off: Parameters normal
On: Parameters abnormal
3
SB0056
(86)
Communication status
Indicates the status of the transient transmission
Off: Transient transmission by the control station
On: Transient transmission by the sub-control station
SB0057
(87)
Parameter type
Indicates the parameter type.
Off: MELSECNET/10 parameter
On: MELSECNET/H parameter
SB0058
(88)
Operation designation at
fault of control station
On PLC to PLC network
Indicates the setting of "With data link by sub control station
when control station is down."
Off: Cyclic transmission made by sub control station when
control station fails.
On: Cyclic transmission not made by sub control station
when control station becomes faulty
Operation designation at
fault of (multiplexed)
remote master station
On remote I/O network
Indicates the status of designating cyclic transmission when the
(multiplexed) remote master station fails.
Off: Cyclic transmission made by multiplexed remote sub-
master station when multiplexed remote master station
fails (multiplexed remote I/O network)
On: Cyclic transmission not made when remote master
station fails (remote I/O network)
SB0059
(89)
Low-speed cyclic
designation
Indicates whether or not there are any parameter settings for the
low-speed cyclic transmission.
Off: No settings
On: Settings exist
SB005A
(90)
Parameter type 2
Indicates the parameter type of the control station.
Off: MELSECNET/10 mode, MELSECNET/H mode
On: MELSECNET/H Extended mode
SB005B
(91)
END asynchronous
settings
Indicates the END asynchronous settings status of the remote
I/O network.
Off: END asynchronous settings disabled
On: END asynchronous settings enabled
SB005C
(92)
I/O master station
(Block 1)
Indicates the I/O master station setting (Common parameter
setting) of block 1. (Valid when SB0049 is OFF)
Off: No setting
On: Setting exists. (Station No. is stored in SW005C.)
SB005D
(93)
I/O master station
(Block 2)
Indicates the I/O master station setting (Common parameter
setting) of block 2. (Valid when SB0049 is OFF)
Off: No setting
On: Setting exists. (Station No. is stored in SW005D.)
3: Valid only when SB0047 is off. When it turns on (error), the last data are retained.