Mitsubishi Electric MELSEC iQ-RJ71GF11-T2 - Page 363

APPX
Appendix 7 Processing Time
361
A
Redundant slave station (redundant local station)
The following are the formulas to calculate cyclic data holding time when system switching occurs in the redundant local
station configuration.
*1
*1 The meanings of the variables in the equation are as follows.
*2 For delay time until detection of the system switching cause, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
*3 Depending on the failure status of the power supply module, the cyclic data holding time (T
H
) is calculated by the following formula.
100 + Tsw + Tjo + SS
*4 When the redundant function module is disconnected from the base unit or depending on the failure status of the base unit, the cyclic
data holding time (T
H
) is calculated by the following formula.
2.5 + (2  LS) + Tsw + Tjo + SS
Pattern No. System switching cause Cyclic data holding time (T
H
) [ms] Timing chart
1 • Failure of the control system power supply module
*3
• Power-off of the control system
• Failure of the control system Process CPU (redundant
mode)
• Failure of the control system base unit
*4
• Failure of the control system redundant function
module
*4
Delay time until detection of the system
switching cause
*2
+ Tsw + Tjo + SS
Page 362 Pattern 1
2 • Stop error of the control system Process CPU
(redundant mode)
• Execution of the system switching instruction
• System switching request from the engineering tool
• System switching request from another network
module
Delay time until detection of the system
switching cause
*2
+ Tsw + Tjo + SS
Page 363 Pattern 2
3 System switching request
from the RJ71GF11-T2
(own station)
Own station data link error 2100 + Tc + Tsw + Tjo + (SS  2) Page 364 Pattern 3
Variable Meaning
Tsw Process CPU (redundant mode) system switching time [ms] ( MELSEC iQ-R CPU Module User's Manual (Application))
Tjo Delay time until initial output after system switching [ms] ( MELSEC iQ-R CPU Module User's Manual (Application))
SS Process CPU (redundant mode) sequence scan time [ms] ( MELSEC iQ-R CPU Module User's Manual (Application))
Tc System switching monitoring time setting value [ms] ( Page 139 Supplementary Cyclic Settings)