Siemens SINAMICS G220 - Response Times When Controlling Via Terminals

• 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 Technical data - Response times
Property Function Unit Value
WCDT / OFDT STO / SS1 ms (2 · p9500) + t_K
1
WDTime STO / SS1 ms F_WD_Time+(2 · p9500) + t_K
1
DAT  ms (2·p9500) + t_K
1
+ t_K
2
State change F-DI  ms p10017 + (2 ·p9500) + 3.5ms + t_K
2
p9500: 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.
p10017: Debounce time of the F-DI (factory setting: 4ms)
F_WD_Time: PROFIsafe monitoring time
Take the F_WD_Time from your PROFIsafe con󹪝guration.
t_K
1
: Time for the internal converter communication when receiving a PROFIsafe tele‐
gram
• For isochronous communication: t_K
1
= T
o
. Determine T
o
from the bus con󹪝g‐
uration on the control side.
• For non-isochronous communication: t_K
1
= 4 ms
t_K
2
: Time for the internal converter communication when sending a PROFIsafe tele‐
gram
• For isochronous communication: t_K
2
= bus cycle time.
The bus cycle time is the send clock of the PROFINET controller.
• For non-isochronous communication: t_K
2
= 4 ms
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.
Technical data
17.11Safety Integrated Functions
SINAMICS G220 converter
822 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB