Response Times Of The Safety Bus - Lenze 8400 protec StateLine mit SO10 Manual

4 Safety option 20
Response times

Response times of the safety bus

4.9.2 Response times of the safety bus
PROFIsafe
Response time to an event in the safety sensors (PROFIsafe input data)
Time interval (Fig. 4−3)
t Response time of the sensors
1
t
Input delay of the safe inputs
2
t Processing time in drive−based safety
3
PROFIsafe input data ready for transmission to ...
t PROFIsafe cycle time
Ps
PROFIsafe input data ready for processing in the safety PLC ...
Tab. 4−3
Response time to a PROFIsafe control word (PROFIsafe output data)
Time interval (Fig. 4−3)
t Processing time in the safety PLC
4
t PROFIsafe cycle time
Ps
t Processing time in drive−based safety
5
Safety function starts after ...
Tab. 4−4
Information on how to calculate the processing time and transmission time of the
PROFIsafe can be found in the documentation of the safety PLC used.
)
Note!
If PROFIsafe communication is troubled, the fail−safe status will be reached
after the PROFIsafe monitoring time (F_WD_Time) has expired. PROFIsafe
communication is passivated.
Example
After an event has occurred at a safe input, the message is fed back to drive−based
ƒ
safety via the safety PLC.
Drive−based safety activates a safety function.
ƒ
Hence, the maximum response time to the event is calculated as follows:
ƒ
t
max response
When calculating the maximum response time, include the times of the safety functions,
e.g. in case of SS1 the stopping time (30 s) until STO is active.
34
Response time to an event in the sensors
Response time in case of PROFIsafe request
= t + t + t + max {t
1 2 3
l
C15034:
Input error:
; t + t + t + t }
WD PS 4 Ps 5
[ms]
according to manufacturer
information
0 ... 100
2
24
S
according to manufacturer
information
S
[ms]
must be calculated
according to manufacturer
information
14
S
EDS84DPSO01 EN 2.1