Siemens SINAMICS G220 - Response Times When Controlling Via Profisafe

The speci󹪝ed response times are applicable for a fault-free drive system as well as when a
fault is active in the system.
Table 17-21 Technical data - Response times
Function Unit Worst case delay time
SDI and SLS ms (3 · p9500) + t_R
SSM (output to the bus) ms (3 · p9500) + p9545 + t_K
2
SSM (output at terminals) ms (2 · p9500) + p9545 + 1.5
SMT Motor overtemperature or internal
error
ms 300
Short-circuit or wire break s 1
p9500: Monitoring cycle (factory setting: 4ms)
t_R: t_R depends on the relevant stop response initiated after the limit is breached:
• STO: 0.5ms
• SS1: 2ms
p9545: SSM 󹪝lter time
t_K
2
: Time for the internal converter communication when sending a PROFIsafe telegram
• For isochronous communication: t_K
2
=T
dp
. Determine T
dp
from the bus con󹪝gu‐
ration on the control side.
• For non-isochronous communication: t_K
2
= 4 ms
17.11.4 Response times when controlling via PROFIsafe
Technical data
The response times are converter-internal response times. Program runtimes in the F‑host and
the transmission time via PROFINET are not taken into account. Consider the following with
regard to the calculation of the response times between F-CPU and converter: Safety Integrated
Functions are only selected after the PROFIsafe monitoring time (F_WD_Time) has elapsed, e.g.
due to communication faults. The PROFIsafe monitoring time (F_WD_Time) must therefore also
be included as a relevant component in the calculation when an error occurs.
Notes regarding understanding the following table
The speci󹪝ed response times are applicable for a fault-free drive system as well as when a
fault is active in the system.
• Worst Case Delay Time (WCDT): Maximum response time between a PROFIsafe telegram
being received and a stop function being initiated when there is no fault
• One Fault Delay Time (OFDT): Maximum response time between a PROFIsafe telegram being
received and a stop function being initiated when a fault is active
• Watchdog Time (WDTime): Time between receiving the last valid PROFIsafe telegram and the
initiation of a stop function after the PROFIsafe monitoring time elapses
Technical data
17.11Safety Integrated Functions
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 821