Mitsubishi Electric MELSEC iQ-R Series - Page 241

APPX
Appendix 1 Calculating Safety Response Time for System Configured with a Safety CPU
239
A
CC-Link IE Field Network link scan time (LS)
Calculation formula of the CC-Link IE Field Network link scan time (LS) [s]
(When link scan mode is "Sequence Scan Asynchronous")
LS = {Total points assigned for cyclic transmission  0.08 + (number of actually connected slave stations  Ka) + Kb + Kc +
Kd}  1000 + (Number of interrupt conditions in the interrupt setting)  0.02 + (Total Ke of each unit)  1000 + St [ms]
• Total points assigned for cyclic transmission: Total number of points assigned for cyclic transmission Calculate with formula
below.
(Total number of set points of RX and RY)  4 + (total number of set points of RWr and RWw)  4
• Number of connected slave stations: Number of slave stations connected in a network Number of actually connected
stations, instead of set value as a parameter
If link scan mode is set to sequence scan synchronization, the link scan time becomes identical with that of the sequence
scan. If the sequence scan synchronization is set, set "Constant Scan Setting" of "RAS Setting" as the CPU parameter and
set the sequence scan interval to constant.
■Values of factors for each cyclic transmission mode
The following table shows values of factors for each cyclic transmission mode.
*1 For details on the standard mode and high speed mode, refer to the following.
 MELSEC iQ-R CC-Link IE Field Network User's Manual (Application)
*2 Number of local stations and safety communication settings
*3 Number of safety communication settings for remote device station
*4 Number of safety communication settings for master and other local stations
Item Cyclic transmission mode
Normal mode
*1
High speed mode
*1
Ka 25.8 • When data link faulty station setting is "Clear": 18.5
• When data link faulty station setting is "Hold": 9.75
Kb 655 168
Kc (Maximum transient processing
time)
160 + 60  {number of slave stations set at [Basic
Settings] - [Network Configuration Settings]}
80 (if transient transmission is not performed: 0)
Kd (Maximum data link processing
time when the station is disconnected
from or returned to the network)
• If firmware version of the master station is "04" or earlier;
9000 + Total number of ports used in the switching hub  3000
(when switching hub is not used: 9000)
• If firmware version of the master station is "05" or earlier;
Number of disconnected station  3500
St: Processing time between master
and submaster stations when
submaster function is used
[{(RX/RY total number of set points)  + (RWr/RWw total number of set points)  4} + 0.08 + 50]  1000
(when submaster function is not used: 0)
Ke (Processing time factor of module
Ke)
Module Value Module Value
RJ71GF11-T2 Safety communications not
performed: 0
Safety communications
performed:
[Master station]
(1.6  Number of
communication setting
*2
) +
(5.4  Number of
communication setting
*3
) +
32
[Local station]
(1.7  Number of
communication setting
*4
)
+18
RJ71GF11-T2 Safety communications not
performed: 0
Safety communications
performed:
[Master station]
(0.8  Number of
communication setting
*2
) +
(4.1  Number of
communication setting
*3
) +
23
[Local station]
(0.9  Number of
communication setting
*4
)
+9
Others 0 Others 0