Mitsubishi Electric L26CPU-BT User Manual page 153

(7) 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.
SB0070
(Master station information)
SB007B
(Host master/standby master operation status)
SB005A
(Master switching request acknowledgement)
SB005B
(Master switching request complete)
SB0001 (User operation)
(Refresh instruction at standby master switching)
SB0042
(Refresh instruction acknowledgement status
at standby master switching)
SB0043
(Refresh instruction complete status at standby
master switching)
*1 When turning on SB005A, save data stored in RX, RY, RWr, and RWw to the devices and set data stored in RX to RY,
data stored in RY to RX, data stored in RWr to RWw, and data stored in RWw to RWr using a program. In addition, turn
on SB0001.
After saving data stored in RX, RY, RWr, and RWw to the devices, wait a fixed number of scans and execute the
processing that sets data stored in RX to RY, data stored in RY to RX, data stored in RWr to RWw, and data stored in
RWw to RWr using a program and the processing that turns on SB0001.
For details, refer to Page 149, Section 8.2.7 (5)
ON
OFF
ON
OFF
ON
OFF *1
OFF
OFF
OFF
OFF
CHAPTER 8 FUNCTIONS
ON
ON
ON
ON
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