Mitsubishi Electric MELSEC iQ-R Series User Manual page 185

■Pattern 2
The following figure shows a timing chart for normal value.
Control station
Control station
Station No.1
System A
Sequence
Control
scan time
station
(SS)
Station No.1
Data sent from
station No.1 to 0)
another station
System A Control system
System B Standby system
Normal station
Normal station
Station No.2
System B
Normal
station
Sequence
Station No.2
scan time
(SS)
Data sent from
station No.2 to
another station
Receive data
in another
Another
station (from
station
station No.1
or No.2)
1 2
1) 2)
Control station switching time (C Control station switching time (C
Cyclic transmission delay time
0) 1)
Communication faulty station
Power down
3
Delay time until system switching cause detection
Standby system
Control system
System switching time (T
Sub-control station
) )
sw sw
3
2)
Cyclic data holding time (T )
H
)
sw
Delay time until first output after
system switching (T )
jo
4 5
3) 4)
Cyclic transmission delay time
3) 4)
APPX
Appendix 6 Processing Time
A
183