Safety Shutdown Mat (Cross-Circuit Principle) - Siemens Sirius 3RK3 System Manual

Description of the software
6.7 Functions
Parameter name
Parameter - Start
See also
Messages for safety shutdown mat (NC principle) (Page 264)
6.7.3.4

Safety shutdown mat (cross-circuit principle)

Description
With the function "Safety shutdown mat (cross-circuit principle)", the signals from the safety
shutdown mats with cross-circuit detection are evaluated.
When the safety shutdown mat is actuated, the function output Q is deactivated, i.e. set to
"0".
Parameters
Parameter name
General
170
Cross-circuit detection
Startup test
Type of start
Name
Element number
Element activated
Description/parameter value
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".
Description/parameter value
You can enter a name for the element here.
Consecutive number which is automatically assigned. You can
change the number.
When this parameter is active, the function is processed in the
safety logic.
When this parameter is deactivated, the set substitute value is
made available at the output Q.
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02