Siemens SIRIUS 3RK3 - Clocking

Description of the software
6.7 Functions
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
201
6.7.9.7 Clocking
Description
Note
The time value is not stored. At the start of safety mode, all time values begin with their initial
values.
The safety relay supports the timer function "Clocking". The output is activated and
deactivated periodically based on a parameterizable pulse/interval ratio.
The timer function has one input IN and one function output Q.
Functional principle
● When there is a positive edge "0 → 1" at the input IN, clock pulse generator starts. The
function output Q sends pulses as long as the input is set to "1".
● When there is a negative edge "1 → 0" at input IN, the clock pulse generator stops and
sets the function output Q to "0".
Figure 6-18 Timer function "Clocking"
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
t1[s] Parameter
t2[s]
Enter the pulse time for the clock-pulse generator here.
Please note that the pulse 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.