Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual page 191

List of link special relay (SB)
The following table lists the link special relay areas (SB) when they are assigned from SB0000 to SB0FFF.
Do not turn on or off areas whose numbers are not in the following list. Doing so may cause malfunction of the
programmable controller system.
No. Name
SB0006 Clear communication error count
SB0014 Cyclic data receive status clear
SB0040 Network type of own station
SB0043 Module operation mode of own station
SB0044 Station setting 1 of own station
SB0045 Station setting 2 of own station
SB0046 Station number setting status of own
station
SB0049 Data link error status of own station
SB004A CPU minor error status of own station
SB004B CPU moderate/major error status of own
station
SB004C CPU operating status of own station
SB004D Received parameter error
SB0064 Cyclic data receive status
Description
Clears the link special register areas related to communication errors (SW0074 to SW0077) to
0.
Off: Clear not requested
On: Clear requested (valid while on)
Clears 'Cyclic data receive status' (SB0064).
While 'Cyclic data receive status clear' (SB0014) is on, the cyclic data receive status does not
turn on.
Off: Clear not requested
On: Clear requested (enabled while on)
Stores the network type of the own station.
ON: CC-Link IE TSN network
Stores the module operation mode of the own station.
Off: Online mode
On: Other than online mode
Stores the station type of the own station.
Off: Device station (other than the master station)
On: Master station
Stores the communication mode of the own station.
Off: Unicast mode
On: Multicast mode
Stores the station number setting status.
Off: Station number set
On: Station number not set (local station only)
If parameters are set, this relay is always off.
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.)
Stores the minor error status of the CPU module on the own station.
Off: No minor error
On: Minor error
Stores the moderate/major error status of the CPU module on the own station.
Off: No moderate/major error
On: Moderate/major error
Stores the operating status of the CPU module on the own station.
OFF: RUN or PAUSE
On: STOP, or moderate/major 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
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.)
Appendix 2 List of Link Special Relay (SB)
A
APPX
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