Siemens SIRIUS 3RK3 - Fault Reaction Time of the Logic (Single-Channel Actuator Circuit); Fault Reaction Time of the Logic (Two-Channel Actuator Circuit)

6.1.3 Fault reaction time of the logic (single-channel actuator circuit)
Calculation
0665.
[W
&<&/
W
'(/$<
W
7,0(5
W
)5/
4$
0
4%
)4
4$
4%
0
/
W
)%
Figure 6-2 Fault reaction time of the logic for a single-channel actuator circuit
Fault reaction time of the logic
(for a single-channel actuator circuit)
t
FRL1
= (2 x t
CYCL
) + t
DELAY
+ t
TIMER
+ t
FB
For‐
mula
Description
t
FRL1
Fault reaction time of the logic for a single-channel shutdown
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)
t
FB
Max. read-back time of the safety-related outputs:
• MSS central units (Basic / Advanced)
1 ms
• 2/4 F-DI 2F-DO expansion module
1 ms
• 4F-DO expansion module
5 ms
6.1.4 Fault reaction time of the logic (two-channel actuator circuit)
Calculation
0665.
[W
&<&/
W
'(/$<
W
7,0(5
W
)5/
)4)4
4%4$
0
/
4$
4%
0
Figure 6-3 Fault reaction time of the logic for a two-channel actuator circuit
Fault reaction time of the logic (two-
channel actuator circuit)
t
FRL2
= (2 x t
CYCL
) + t
DELAY
+ t
TIMER
Operation
6.1 Response times
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 173