Response Times - Lenze i950 Commissioning Manual

Safety functions

Response times

19.24 Response times
The overall system must be taken into account when determining the response time following
a safety function request.
Parameter set acceptance from the SD card
Safe parameter set acceptance is supported by means of a safe parameter set saved in the
device.
The following are all crucial in determining the response time:
Response time of the connected safety sensor technology
•
Input delay of safety inputs
•
Internal processing time
•
When using a safety bus:
•
Monitoring time for cyclic services
-
Monitoring time in the safety PLC
-
Processing time in the safety PLC
-
Delay times due to additional modules
•
Fig. 81: Response times to the request of a safety function
1 Standard device
2 Integrated safety
3 Safety PLC
4 Safety bus
Response times of inputs
Response time when reacting to an event in the safety sensor technology
t
1
t
2
t
i
Tab. 3: Response time when reacting to an event in the safety sensor technology
Response time of safe output
Response time of safe output to a safety function
Safe output SD-Out 1 switches after
Tab. 4: Response time of safe output
426
S
t t
1 2
t = 0
μC
S
SF
Response time of the safety sensor technology
Input delay of safe inputs
0x211A:002
Input filter
Processing time in the integrated safety sensor
technology
Safety function begins after
t
μC
SF
i
t
t
5
3
t
ps
t
μC
4
Microcontroller
Safety sensors
Safety function triggered
[ms]
According to manufacturer information
0...100
2
4
Ʃ
[ms]
4