Mitsubishi Electric MELSEC iQ-R Series User Manual page 147

List of link special relay (SB) areas
The following table lists the link special relay (SB) areas when they are assigned from SB0000 to SB01FF.
Do not turn on or off areas whose numbers are not on the following list or ranges turned on/off by the system.
Doing so may cause malfunction of the programmable controller system.
No. Name
SB0000 Link startup of own station
SB0001 Link stop of own station
SB0002 System link start
SB0003 System link stop
SB0005 Clear retry count
SB0006 Clear communication error
count
SB0007 Clear forward loop
transmission error count
SB0008 Clear reverse loop
transmission error count
SB0009 Clear loop switching count
SB000A Clear transient
transmission error count
SB000B Transient transmission
error area setting
Description
Starts cyclic transmission of the own station.
Off: Startup not requested
On: Startup requested (valid at rising edge)
(Conditions)
• This register is enabled when 'Baton pass error status of own station' (SB0047) is off.
• For SB0000 to SB0003, only one of the areas can be turned on.
Stops cyclic transmission of the own station.
Off: Stop not requested
On: Stop requested (valid at rising edge)
(Conditions)
• This register is enabled when 'Baton pass error status of own station' (SB0047) is off.
• For SB0000 to SB0003, only one of the areas can be turned on.
Starts cyclic transmission of the entire system. The station where cyclic transmission is
started is specified in 'Link start/stop instruction details' (SW0000) and 'Link start/stop
station' (SW0001 to SW0004).
Off: Startup not requested
On: Startup requested (valid at rising edge)
(Conditions)
• This register is enabled when 'Baton pass error status of own station' (SB0047) is off.
• For SB0000 to SB0003, only one of the areas can be turned on.
Stops cyclic transmission of the entire system. The station where cyclic transmission is
stopped is specified in 'Link start/stop instruction details' (SW0000) and 'Link start/stop
station' (SW0001 to SW0004).
Off: Stop not requested
On: Stop requested (valid at rising edge)
(Conditions)
• This register is enabled when 'Baton pass error status of own station' (SB0047) is off.
• For SB0000 to SB0003, only one of the areas can be turned on.
Clears 'Number of retries on the forward loop side' (SW00C8) and 'Number of retries on
the reverse loop side' (SW00C9) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Clears the link special register areas related to communication errors (SW00B8 to
SW00C7) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Clears 'Line error on the forward loop side' (SW00CC) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Clears 'Line error on the reverse loop side' (SW00CD) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Clears the path switching detection area of the own station (SW00CE to SW00E7) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
SB0009 is turned on until SW00CE reaches 0.
Clears the transient transmission error area of the own station (SW00EE, SW00EF) to 0.
Off: Clear not requested
On: Clear requested (valid while on)
Prohibits 'Transient transmission error history' (SW00F0 to SW00FF) from being
overwritten.
Off: Overwriting permitted
On: Overwriting prohibited
Appendix 3 List of Link Special Relay (SB) Areas
Availability
Control Normal
station Station
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A
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