Mitsubishi QJ71GP21-SX, Reference Manual

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7
PROCESSING TIME
7.5 Cyclic Data Retention Time for System Switching in Redundant System
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(3) Cyclic data retention time when system switching is requested from the
CC-Link IE controller network module (own station)
* 1 Set it by "Network range assignment" of the control station.
Section 6.3 Network Range Assignment
* 2 For details, refer to the following manual.
QnPRHCPU User's Manual (Redundant System)
Th = 150 + Td + Tc + Tsw + (SS × 2) [ms]
Th: Cyclic data retention time
Td: Data link monitoring time
*1
Tc: System switching monitoring time
*1
Tsw: System switching time of Redundant CPU
*2
SS: Sequence scan time of Redundant CPU
*2
Figure 7.7 Cyclic data retention time
1
0)
1)
OFF
ON
2
3
4
5 6
4) 5)
0) 1) 4) 5)
SB0049
Station No.1
Communication
error occurred
Control station
Communication error station
System A CPU
scan time
Data sent from
station No.1 to
another station
System A
System B
System B CPU
scan time
Data sent from
station No.2 to
another station
Data received at
another station
from station
No.1 or 2
Control system
Control system
Standby system
Standby system
System switching time
Data link
monitoring time
System switching
monitoring time
Issue of system
switching request
Cyclic transmission delay time
Cyclic transmission delay time
Cyclic data retention time