Mitsubishi MELSEC Q Series User Manual page 88

4 FUNCTIONS
SB70
(Master station information)
SB7B
(Host master/standby master operation status)
SB5A
(Master switching request acknowledgment)
SB5B
(Master switching request complete)
SB01(User operation)
(Refresh instruction at standby master switching)
SB42
(Refresh instruction acknowledgment status
at standby master switching)
SB43
(Refresh instruction complete status at standby
master switching)
When SB5B is turned on, the program switches RX to RY and RWr to RWw.
In addition, the program turns SB01 on.
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(5) On/off timings of link special relays (SB) relating to the standby
master function
The following shows the on/off timings of the link special relays (SB) relating to
the standby master function.
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
MELSEC-Q
ON
ON
ON
ON
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