Siemens SIRIUS 3RK3 - Page 210

Operator control
7.1 Response times
Modular Safety System 3RK3
208 System Manual, 10/2008, 926 2530-02 DS 02
Calculation formula for the maximum response time of the MSS
t
R
= (3 x t
CYCL
) + t
OUT
+ t
DELAY
+ t
TIMER
t
R
Maximum response time of the MSS
t
CYCL
Program cycle time of the central unit
t
OUT
Output time of the expansion modules
t
DELAY
Input delay for monitoring functions and input cell at the inputs of the expansion
modules
t
TIMER
Timer functions in the logic (timer)
Parameterizing the program cycle time
The parameter for the program cycle time can be defined as follows:
1. In the "Configuration > Main system" view, double-click the "3RK3 Basic" module.
2. Under "Program cycle time [ms]" in the "Properties Central unit" dialog, enter a value
suitable for the scope of your configuration between 10 ms and 60 ms.
Tip
Support by MSS ES
MSS ES helps you configure the program cycle time. The
status bar (Page 98) shows
the current utilization of the maximum program cycle time.
Overall response time t
RSA
of the system (sensors - actuators)
(0(5*(1&<6723 &RQWDFWRU
(0 =0 (0
W
5
066
W
6
W
$
W
56$
Figure 7-2 Overall response time of the system
Calculation formula for the overall response time of the system
t
RSA
= t
S
+ t
R
+ t
A
t
RSA
Overall response time of the system
t
S
Response time of the sensor
t
R
Response time of the MSS
t
A
Response time of the actuator