Siemens SIRIUS 3RK3 - Page 177

Formula Explanation
t
S
For the reaction time of the sensor (S), see the documentation of the sensor.
t
IN
Transmission duration from signal acquisition at the input terminal (IN) to the logic of the
MSS 3RK3; depending on the signal
t
RL
For the reaction time of the logic of the MSS 3RK3, see Chapter "Reaction time of the logic
(in error-free operation) (Page 172)"
t
FRL
For the fault reaction time of the logic of the MSS 3RK3, see Chapters "Fault reaction time
of the logic (single-channel actuator circuit) (Page 173)" and "Fault reaction time of the
logic (two-channel actuator circuit) (Page 173)"
t
DELAY
Input delay for monitoring functions and input cells at the inputs
t
TIMER
Timer functions in the logic (timer)
t
Q
Transmission duration from the logic of the MSS 3RK3 to the output terminal (Q); de‐
pending on the signal; for values, see the graphic above
t
A
For the reaction of the actuator (A) including the time until the signal has been received
and processed by the actuator, see the actuator documentation
t
CYCL
Program cycle time of the MSS 3RK3, con󹪝gured in Safety ES
t
CYCLasi
AS-i cycle time, max. 5 ms
t
OUT
Reaction time of the output terminal on the expansion module (EM Q)
• Semiconductor outputs: 10 ms
• Relay outputs: 20 ms
t
RT
Restart standby time of the
• safe outputs: 420 ms
• non-safety-related outputs: 0 ms
t
FAULTasi
Reaction time of the MSS 3RK3 in case of an error on the AS-i bus: Max. 32 ms
t
FAULTasi-A
Reaction time of the AS-i actuator in case of an error on the AS-i bus: see the documen‐
tation of the AS-i actuator
Operation
6.1 Response times
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 177