Mitsubishi Electric MELSEC iQ-RJ71GF11-T2 - Page 367

APPX
Appendix 7 Processing Time
365
A
Line redundant
The following are the formulas to calculate cyclic data holding time when system switching occurs in the line redundant
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.
When Tjo < Lsw: 100 + (2  LS) + Tsw + Lsw + SS
When Tjo > Lsw: 100 + (2  LS) + Tsw + Tjo + SS
*4 When the redundant function module is removed from the base unit, or depending on the failure status of the base unit, the calculation
formula of the cyclic data holding time (T
H
) may be as follows.
When Tjo < Lsw: 2.5 + (4  LS) + Tsw + Lsw + SS
When Tjo > Lsw: 2.5 + (4  LS) + Tsw + Tjo + SS
Pattern
No.
System switching cause Condition 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
Tjo < Lsw Delay time until detection of the system
switching cause
*2
+ Tsw + Lsw + SS
Page 366 Pattern 1
2 Tjo > Lsw Delay time until detection of the system
switching cause
*2
+ Tsw + Tjo + SS
Page 367 Pattern 2
3 • 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
Tjo < Lsw Delay time until detection of the system
switching cause
*2
+ Tsw + Lsw + SS
Page 368 Pattern 3
4 Tjo > Lsw Delay time until detection of the system
switching cause
*2
+ Tsw + Tjo + SS
Page 369 Pattern 4
5 System switching
request from the
RJ71GF11-T2 (own
station)
• Own station data
link error
• Slave station error
Tjo < Lsw 2.5 + Tc + (2  LS) + Tsw + Lsw + (SS  2) Page 370 Pattern 5
6 Tjo > Lsw 2.5 + Tc + (2  LS) + Tsw + Tjo + (SS  2) Page 371 Pattern 6
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))
Lsw Line switching time [ms] = 1 + (3  LS) + Hsw + Rio
Hsw: System switching time of the remote head module [ms] ( MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual
(Application))
Rio: I/O response time of the remote head module [ms] ( MELSEC iQ-R CC-Link IE Field Network Remote Head 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)
LS Link scan time [ms] ( Page 341 Link scan time)