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Technical data
17.11 Safety Integrated Functions
• Device Acknowledgement Time (DAT): Time between receiving a PROFIsafe telegram and
sending a response to this telegram
• State change at the failsafe digital input (F-DI): Response time when switching an F-DI up to
sending the F-DI state in the PROFIsafe telegram to the F-PLC
Table 17-22
Property
WCDT / OFDT
WDTime
DAT
State change F-DI
p9500:
p10017:
F_WD_Time: PROFIsafe monitoring time
t_K
1
t_K
2
17.11.5
Response times when controlling via terminals
Technical data
The following response times are applicable for stop functions for control via terminals of the
failsafe digital input (F-DI). The response time of a stop function is the time between the
selection of the stop function and the initiation of a stop response.
822
Technical data - Response times
Function
STO / SS1
STO / SS1
Monitoring cycle (factory setting: 4 ms)
If an isochronous PROFIsafe telegram is used, and synchronism with the F-CPU is
optimally set, then p9500 can be reduced from 2 cycles to one cycle. Optimally
matched: bus clock cycle = p9500. The F-PLC receives one PROFIsafe telegram per
cycle from the converter, and the converter receives one PROFIsafe telegram per
cycle from the F-PLC.
Debounce time of the F-DI (factory setting: 4 ms)
Take the F_WD_Time from your PROFIsafe configuration.
:
Time for the internal converter communication when receiving a PROFIsafe tele‐
gram
• For isochronous communication: t_K
uration on the control side.
• For non-isochronous communication: t_K
:
Time for the internal converter communication when sending a PROFIsafe tele‐
gram
• For isochronous communication: t_K
The bus cycle time is the send clock of the PROFINET controller.
• For non-isochronous communication: t_K
Unit
Value
ms
(2 · p9500) + t_K
ms
F_WD_Time + (2 · p9500) + t_K
ms
(2 · p9500) + t_K
ms
p10017 + (2 · p9500) + 3.5 ms + t_K
= T
. Determine T
1
o
= 4 ms
1
= bus cycle time.
2
= 4 ms
2
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
1
1
+ t_K
1
2
2
from the bus config‐
o
SINAMICS G220 converter
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