Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 170

APPENDICES
Total points assigned for cyclic transmission :
Number of connected slave stations
Ka
Kb
Kc (Maximum transient
processing time)
Kd (Maximum data link
processing time when the
station is disconnected from
or returned to the network)
Ke (Processing time factor
of each module)
APPX
Appendix 2 Calculating Safety Response Time When CC-Link Safety and CC-Link IE Field Network are
- 14
Used
3) Link scan time (LS) of CC-Link IE Field Network
This time is required to calculate the transmission time of CC-Link IE Field
Network. The following is the calculation example.
LS = (Total points assigned for cyclic transmission
+ (Number of connected slave stations
+ (Number of interrupt conditions in the interrupt setting)
+ (Total Ke values of all stations)
The following table lists values of factors for each cyclic transmission mode.
Table APPX.3 Factors used in the formula
Item
Normal mode
160 +60
slave stations set in the
parameters
The following is the processing time factor of each module. Add values of all stations.
• CC-Link IE Field Network master/local module (with safety functions)
Safety station: 300
Standard station: 0
• Other than the module above: 0
Total number of points assigned for cyclic transmission,
(RX points + RY points)/8
+ (RWr points + RWw points)
: Number of slave stations connected in a network
Cyclic transmission mode
When "Set input data (RX/RY) to OFF or cleared to 0" is set
in the Network Operation Setting: 18.5
25.8
When "Hold input data (RX/RY)" is set in the Network
Operation Setting: 9.75
655
Total number of
9000 + Total number of ports used in the switching hub
0.08
Ka) + Kb + Kc + Kd)
0.02
1000 [ms]
2 [byte]
High speed mode
168
80
1000
3000