Siemens SIRIUS 3RK3 - Parameterizing in Safety es

Formula Description
t
RSA_3-2
Reaction time "sensor - actuator" in error-free operation; only subsystem 2 is considered.
t
FRSA_3-2
Fault reaction time "sensor - actuator"; only subsystem 2 is considered; for two-channel
actuator wiring identical to t
RSA_1
t
RL
Reaction time of the logic of the MSS 3RK3 in error-free operation
t
FRL
Fault reaction time of the logic of the MSS 3RK3, for two-channel actuator wiring iden‐
tical to t
RL
t
CYCLasi
AS-i cycle time, max. 5 ms
t
A
For the reaction time of the actuator (A), see the documentation of the actuator
The total reaction times are calculated as follows:
To calculate the total reaction times from the sensor up to the actuator, the two partial reaction
times must be added. Because no sensor or actuator hangs between the two MSS 3RK3 units, t
S
and t
A
do not have to be considered at this point.
Note
Note that t
CYCL
and t
RL
may di󹪜er for the two systems. They must each be assigned to the correct
system.
Reaction time "sensor - actuator"
(in error-free operation)
t
RSA_3
= t
RSA_3-1
+ t
RSA_3-2
Fault reaction time "sensor - ac‐
tuator"
t
FRSA_3
= t
FRSA_3-1
+ t
FRSA_3-2
6.1.7 Parameterizing in Safety ES
Parameterizing the program cycle time t
CYCL
of the MSS 3RK3 in Safety ES
The parameter for the program cycle time can be de󹪝ned as follows:
1. In the "Con󹪝guration > Main system" work window, double-click the con󹪝gured 3RK3 central
unit.
2. Enter a value for "Program cycle time [ms]" that is suitable for the scope of your
con󹪝guration in the "Central unit properties - MSS Slot 3" dialog box.
– 3RK3 Basic: 10 ... 60 ms
– 3RK3 Advanced/ 3RK3 ASIsafe basic/ 3RK3 ASIsafe extended: 15 ... 60 ms
(With deactivated AS-Interface: 10 ... 60 ms)
Operation
6.1 Response times
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 185