Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 447

APPENDICES
No. Name
1 3
SB0000 Link startup (host)
(0)
1 3
SB0001 Link stop (host)
(1)
1 3
SB0002 System link startup
(2)
1 3
SB0003 System link stop
(3)
SB0005
Clear retry count
(5)
1
Clear communication
SB0006
error count
(6)
1: Used in the network tests of GX Developer.
2: The SB0000 to SB0003 become valid when only one point turns on.
OFF
SB0000
OFF
SB0001
3: Valid only when the SB0047 is off. When it turns on (error), the last data are retained.
App - 8
Table 3 Link special relay (SB) list
Restarts the host's cyclic transmission.
Off: Start not instructed
On: Start instructed (valid at rise)
Stops the host's cyclic transmission.
Off: Stop not instructed
On: Stop instructed (valid at rise)
Restarts the cyclic transmission according to the contents of
SW0000 to SW0004.
Off: Start not instructed
On: Start instructed (valid at rise)
Stops the cyclic transmission according to the contents of
SW0000 to SW0004.
Off: Stop not instructed
On: Stop instructed (valid at rise)
Clears the retry count (SW00C8 to SW00C9) to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
Clears the communication error (SW00B8 to SW00C7) to 0.
Off: Clear not instructed
On: Clear instructed (valid when on)
ON
OFF
ON
AB0001 is valid
SB0000 is valid
Description
2
2
2
2
2
2
[Availability column] Loop: optical loop, Bus: coaxial/twisted bus
MELSEC-Q
Use permitted/prohibited
Remote
Control Normal
master
station station
station
Loop Bus Loop Bus Loop
: Available,
Remote I/O
station
Bus Loop Bus
: Not available
App - 8