Mitsubishi Electric MELSEC-Q Series - Page 577

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APPENDICES
A
Appendix 1 Link Special Relay (SB) List
SB0060 Communication mode
Stores the constant link scan status.
OFF: Constant link scan is invalid
ON: Constant link scan is valid
(Condition)
• Valid when Data link status of own station (SB0049) is OFF.
SB0061
Cyclic transmission
punctuality assurance
Stores the status of cyclic transmission punctuality assurance.
OFF: Cyclic transmission punctuality assurance is invalid
ON: Cyclic transmission punctuality assurance is valid
(Condition)
• Valid when Data link status of own station (SB0049) is OFF.
SB0064
Own station's loop
status
Stores the transmission path status of the own station.
OFF: Normal
ON: Error
When an error is identified, the error details can be checked by Own station's
loop status (SW0064).
SB0065 Loopback status
Stores the loopback execution status. (Including own station)
OFF: All stations normal
ON: Station where loopback is performed exists
(Condition)
• Valid when Baton pass status (own station) (SB0047) is OFF.
When Baton pass status (own station) (SB0047) is turned ON (error), data
prior to error is held.
SB0066
Own station's IN-side
link-up status
Stores the IN-side link-up status of own station.
OFF: Linking up
ON: Linking down
SB0067
Own station's OUT-side
link-up status
Stores the OUT-side link-up status of own station.
OFF: Linking up
ON: Linking down
SB0068
Own station's IN-side
link establishing status
Stores the IN-side link establishing status of own station.
OFF: Link establishment completed
ON: Link establishing
SB0069
Own station's OUT-side
link establishing status
Stores the OUT-side link establishing status of own station.
OFF: Link establishment completed
ON: Link establishing
SB006A
Own station's IN-side
cabling status
Stores the IN-side cabling status of own station.
OFF: Normal
ON: Inserted incorrectly
SB006B
Own station's OUT-side
cabling status
Stores the OUT-side cabling status of own station.
OFF: Normal
ON: Inserted incorrectly
SB006C
Own station's IN-side
error frame reception
status
Stores whether the error frame is received or not in the IN-side of own
station.
OFF: Error frame is not received at present
ON: Error frame is received at present
SB006D
Own station's OUT-side
error frame reception
status
Stores whether the error frame is received or not in the OUT-side of own
station.
OFF: Error frame is not received at present
ON: Error frame is received at present
No. Name Description
Availability
Control
station
Normal
station