Pilz PSS SB FT, Basic license - Manual (Page 55)

Modular Block System: Burner Management 6-11
Setting/resetting the step with time delay but without monitoring time
Spurious signals
The time delay D_V is started if the step enabling condition is met.
After the time has elapsed the D_E output is set.
Instead of the next step being
activated immediately with the
NEXT output, it can be delayed
using the
D_E output.
Time delay
Multiple-recurring step enabling conditions have no nega-
tive influence on the function.
The time delay
D_V is started once only with the initial
0-1 edge at the COND input.
In each case: a “1”-Signal at the STEP-input resets the
outputs NEXT and D_E.