APPX
Appendix 4 List of Link Special Relay (SB)
271
A
SB0049 Data link error status of own
station
Stores the data link error status of the own station.
Off: Normal
On: Error
When this relay is turned on, the cause of the error can be checked
with 'Cause of data link stop' (SW0049). Depending on the link
refresh timing, the update of 'Cause of data link stop' (SW0049) may
be offset by one sequence scan.
(Also used in the CLPA conformance test.)
(Updated even if set as an error invalid station.)
SB004A CPU minor error status of
own station
Stores the minor error status of the FX5 CPU module on the own
station.
Off: No minor error
On: Minor error
SB004B CPU moderate/major error
status of own station
Stores the moderate/major error status of the FX5 CPU module on
the own station.
Off: No moderate/major error
On: Moderate/major error
SB004C CPU operating status of own
station
Stores the operating status of the FX5 CPU module on the own
station.
Off: RUN
On: STOP, PAUSE, or moderate/major error
SB004D Received parameter error Stores the status of received parameter. (For the master station, this
relay stores the parameter status of the own station)
Off: Normal
On: Error
SB004F Station number status of the
operating station
Stores the station number setting method as follows when the
station type of the own station is local station.
Off: Set by parameters
On: Set by program
SB0064 Cyclic data receive status Shows the receive status in the communication cycle in which the
cyclic data from the device station is set using "Disconnection
Detection Setting" in the master station.
Off: Cyclic data received
On: Cyclic data not received consecutively
(Conditions)
• This relay turns on when an error is detected for one or more
stations by an alive check.
• Reserved stations and stations that surpass the maximum station
number are ignored.
(Also used in the CLPA conformance test.)
(Updated even if set as an error invalid station.)
(Updated even if set as a reserved station.)
SB006A PORT1 link-down status of
own station
Stores the link-down status of the own station P1 side.
Off: Link-up
On: Link-down
The time until link-up starts after power-on or Ethernet cable
connection may vary. Normally link-up takes several seconds.
Depending on device status on the line, link-up processing is
repeated and may increase the time.
(Also used in the CLPA conformance test.)
(Updated even if set as an error invalid station.)
(Updated even if set as a reserved station.)
SB006B PORT2 link-down status of
own station
Stores the link-down status of the own station P2 side.
Off: Link-up
On: Link-down
The time until link-up starts after power-on or Ethernet cable
connection may vary. Normally link-up takes several seconds.
Depending on device status on the line, link-up processing is
repeated and may increase the time.
(Also used in the CLPA conformance test.)
(Updated even if set as an error invalid station.)
(Updated even if set as a reserved station.)
No. Name Description Availability
Master
station
Local station
Unicast
mode
Multicast
mode
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