Safety engineering
Safety functions
Safe PROFIsafe connection
1
1.3
1.3.5
1.3-10
EDS94AYAD EN 2.2
1.3.5.2 Response times
In order to detect the response time to a safety function the entire system
must be considered. The following is relevant:
ƒ Response time of the connected sensors.
ƒ Input delay of the safety inputs.
ƒ Internal processing time.
ƒ Monitoring time for the cyclic service in the PROFIBUS.
ƒ Monitoring time of the PROFIsafe in the safety PLC.
ƒ Processing time in the safety PLC.
ƒ Delay times due to further components.
μC
μC
S
SF
t=0
t
1
t
2
0
1
t
ps
t
4
2
PROFIBUS
t
3
t
5
lcu12x_352
Fig. 1.3-1 Response times to the request of a safety function
Basic device
Safety module
Safety PLC
μC Microcontroller
S Safety sensor technology
SF Activated safety function
To Next Page
Loading...
