Lenze i950

Response
me of the safety bus
Response
me when reacng to an event in the safety sensor technology (input data) [ms]
t
1
Response me of the safety sensor technology See manufacturer informaon
t
2
Input delay of safe inputs
0x211A:002 0...100
Input lter 2
t
3
Processing me in the integrated safety system
Main task cycle me Technology applicaon 1
PLC project According to the seng
Internal transmission me 40
Input data ready for transmission t
1
+ t
2
+ t
3
t
ps
PROFINET cycle me See manufacturer informaon
Input data ready for processing in the safety PLC t
1
+ t
2
+ t
3
+ t
ps
Tab. 5: Response me when
reacng to an event in the safety sensor technology
Response
me when reacng to a control word (output data) [ms]
t
4
Processing me in the safety PLC Calculate
t
ps
PROFINET cycle me See manufacturer informaon
t
5
Processing me in the integrated safety system
Main task cycle me Technology applicaon 1
PLC project According to the seng
Internal transmission me 108
Safety cycle me 4
Safety funcon begins aer t
4
+ t
ps
+ t
5
Tab. 6: Response me when
reacng to a request via the safety bus
Informaon on how the processing me is calculated and on the safety bus transmission me
can be found in the documentaon of the safety PLC you are using.
If the safety bus communicaon is faulty aer the safety bus monitoring me
(F_WD_Time) expires, the system switches to the fail-safe state. The safety bus
communicaon is passivated.
Example
•
Aer an event on a safe input, the message is looped back to the integrated safety system
via the sa
fety PLC.
•
The integrated safety system then triggers a safety funcon.
•
The ma
ximum response me to the event is then calculated as follows:2
-
t
ma
x
= t
1
+ t + t
3
+ max (F_WD_Time; t
ps
+ t
4
+ t
ps
+ t
5
)
-
Include the mes of the safety funcons into the calculaon. For instance, for SS1 the
stopping me unl STO is acve. 0x2894:001
Safety funcons
Response mes
449