Siemens SIRIUS 3RK3 - Reaction Time of the Logic (in Error-Free Operation)

Relevant times
When calculating the reaction times of the MSS 3RK3, the following times con󹪝gured in the
Safety ES must be considered:
• Program cycle time of the central unit
– Without AS‑i interface (3RK3 Basic): 10 ... 60 ms
– With AS‑i interface (3RK3 Advanced, 3RK3 ASIsafe basic, and 3RK3 ASIsafe extended):
Program cycle time
3RK3 Advanced 3RK3 ASIsafe basic 3RK3 ASIsafe extended
AS-i interface ac‐
tivated
15 ... 60 ms 15 ... 60 ms 15 ... 60 ms
AS-i interface de‐
activated
10 ... 60 ms 10 ... 60 ms 10 ... 60 ms
• Relevant input delay times for monitoring functions and input cells at the inputs of the
expansion modules
• Relevant timer functions in the logic (timer)
6.1.2 Reaction time of the logic (in error-free operation)
Calculation
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Figure 6-1 Reaction time of the logic (in error-free operation)
Reaction time of the logic
(in error-free operation)
t
RL
= (2 x t
CYCL
) + t
DELAY
+ t
TIMER
Formula Description
t
RL
Reaction time of the logic (in error-free operation)
t
CYCL
Program cycle time of the MSS 3RK3
t
DELAY
Input delay for monitoring functions and input cells at the inputs
t
TIMER
Timer functions in the logic (timer)
Operation
6.1 Response times
SIRIUS 3RK3 Modular Safety System
172 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006