Mitsubishi Electric MELSEC iQ-R Series User Manual page 137

List of link special relay (SB) areas
The following lists the link special relay (SB) areas.
Do not turn on or off areas whose numbers are not on the list or ranges turned on/off by the system. Doing so
may cause malfunction of the programmable controller system.
No. Name
SB0006 Clear communication error count
SB0046 Station number setting status of
own station
SB0047 Baton pass status of own station
SB0049 Data link error status of own station
SB004A Minor error status of own station
SB004B Moderate/major error status of own
station
SB004C Operation status of own station
SB004F Station number status of the
operating station
SB006A PORT1 link-down status of own
station
SB006B PORT2 link-down status of own
station
Description
Clears the link special register areas related to communication errors (SW0074 to SW0077, SW007C to
SW007F) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Stores the station number setting status.
Off: Station number set
On: Station number not set
If parameters are set using the engineering tool, this relay is always OFF.
Stores the baton pass status (transient transmission availability) of the own station.
Off: Normal
On: Error
When this relay is turned on, the cause of the error can be checked with 'Baton pass status of own station'
(SW0047) and 'Cause of baton pass interruption' (SW0048).
Depending on the link refresh timing, the update of 'Baton pass status of own station' (SW0047) and 'Cause
of baton pass interruption' (SW0048) may be offset by one sequence scan.
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.
(Conditions)
• This relay is enabled when 'Baton pass status of own station' (SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on (error), data prior to error is held.
Stores the minor error occurrence status of the own station.
Off: No minor error
On: Minor error
Stores the moderate/major error occurrence status of the own station.
Off: No moderate/major error
On: Moderate/major error
Stores the operating status of the own station.
Off: RUN
On: STOP or moderate/major error
Stores information on whether the module is operating with the network number and station number set in
the "Network Required Setting" of "CPU Parameter", or with the numbers set in the CC-Link IE Field
Network diagnostics.
Off: Operating using the values set in "Network Required Setting" of "CPU Parameter"
On: Operating using the values set in the CC-Link IE Field Network diagnostics (When no parameter is set
in the remote head module, or no station number has been set in the CC-Link IE Field Network
diagnostics after the network and station number fields are left blank in "Network Required Setting" of
"CPU Parameter".)
(Conditions)
• This relay is enabled when 'Baton pass status of own station' (SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on (error), data prior to error is held.
Stores the link down status of the own station P1 side.
Off: Link-up
On: Link-down
The time that link-up starts after power-on or Ethernet cable connection may vary. Normally link-up takes
several seconds. Note, however, that the time may be extended further if the link-up processing is repeated
depending on the status of the device on the line.
Stores the link down status of the own station P2 side.
Off: Link-up
On: Link-down
The time that link-up starts after power-on or Ethernet cable connection may vary. Normally link-up takes
several seconds. Note, however, that the time may be extended further if the link-up processing is repeated
depending on the status of the device on the line.
Appendix 1 List of Link Special Relay (SB) Areas
A
APPX
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