Siemens Sirius 3RK3 System Manual page 168

Description of the software
6.7 Functions
Parameter name
Parameter - Start
See also
EMERGENCY STOP messages (Page 262)
166
Input delay [ms]
Cross-circuit detection
Startup test
Type of start
Description/parameter value
Select here when the functions further process the signals:
Input delay = "0":
•
The input signals are further processed by the function without
time delay when there is a signal change.
Input delay not "0":
•
This parameter can be used to suppress signal interference.
The signal state that was pending for most of the duration of
the input delay is further processed.
Please note that the delay time specified by you is a multiple of the
program cycle time specified by you in the properties of the central
unit.
For additional information on the program cycle time, refer to the
Response times
chapter.
When this parameter is activated, cross-circuits are detected with
the aid of test outputs at the inputs.
Activated:
•
After powering up the MSS or changing to safety mode, a
startup test must be executed. For this purpose, the sensor to
be monitored must be actuated once. Only then can the
function output Q be activated depending on the type of start.
Deactivated:
•
A startup test is not required after connecting the power supply.
Automatic:
•
The function output is set as soon as all start conditions are
fulfilled.
Monitored:
•
The function output is set as soon as all start conditions are
fulfilled and the start signal is changed from "0 → 1 → 0".
Manual:
•
The function output Q is set as soon as all start conditions are
fulfilled and the start signal is changed from "0 → 1".
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02