Description of the software
6.7 Functions
Modular Safety System 3RK3
200 System Manual, 10/2008, 926 2530-02 DS 02
Functional principle
● When there is a positive edge "0 → 1" at the input IN, function output Q is set to "1".
● When there is a negative edge "1 → 0" at input IN, delay time "t1" begins.
● When there is a positive edge "0 → 1" at input IN before the the end of delay time "t1", the
delay time is reset. Function output Q remains active, i.e. set to "1".
● After the delay time, function output Q is deactivated, i.e. set to "0".
Parameters
Parameter name Description/parameter value
Name You can enter a name for the element here.
Element number Consecutive number which is automatically assigned. You can change
the number.
Element activated When this parameter is active, the function is processed in the safety
logic.
When the parameter is deactivated, the set substitute value is made
available at the output Q.
General
Function output substitute
value
"0" or "1" can be assigned to the substitute value when the element is
deactivated.
Substitute value "0" means output Q = 0
substitute value "1" means output Q = 1
Parameters t1[s]
• You enter the delay time here.
• The maximum value is 655 s, increment: 5 ms
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.
See also
Messages for timer functions (Page 268)
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