900
APPX
Appendix 9 Processing Time
Overhead time when executing safety cycle processing
The safety cycle processing execution time indicates the overhead time when executing safety cycle processing.
■Overhead time before starting safety cycle processing
Overhead time before starting safety cycle processing [s] = Total standard/safety shared label usage capacity
*1
KM1 +
KM2
*1 The capacity indicates the total usage capacity for labels defined in the standard/safety shared label setting file. This can be verified in
SD1903. ( Page 833 List of Special Register Areas)
This is not the capacity set in the Safety CPU parameter Standard/Safety Shared Label Area Capacity.
■Overhead time when ending safety cycle processing
The safety cycle processing execution time of the overhead time [s] when ending safety cycle processing
Processing time of safety communications
This section describes the processing time of safety communications.
■Input processing time of safety communications
Input processing time of safety communications [s] = (Number of connections set in the safety communication setting
KM1) + (Number of mountable CC-Link IE Field Network modules set for safety communications KM2) + KM3
■Output processing time of safety communications
Output processing time of safety communications [s] = (Number of connections set in the safety communication setting
KM1) + (Number of mountable CC-Link IE Field Network modules set for safety communications KM2) + KM3
■Processing time when multiple programs are executed (safety program switching time)
The processing time [s] with multiple programs run is given by: the number of program files 7.5.
Constant Constant value
SIL2 Process CPU Safety CPU
KM1 Without an extended SRAM cassette 0.15 0.15
With an extended SRAM cassette 0.22 0.22
KM2 170 165
Overhead time when ending safety cycle processing [s]
SIL2 Process CPU Safety CPU
85 80
Constant Constant value
KM1 5
KM2 15
KM3 70
Constant Constant value
KM1 12
KM2 10
KM3 85
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