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Function diagram Description
Reappearance of the signal (S) while the
countdown is running does not affect the
execution of the relay scenario.
Delay On (Leading edge) / Delay Off (Trailing
edge).After the relay is energized, it remains
in a steady state until a signal (S) is detected.
Once the signal (S) is detected, a countdown
(T) is started. After the countdown is nished,
contacts 15-16 (25-26) open, contacts 15-18
(25-28) close and as long as the signal (S) is
detected, the relay will remain in this state.
As soon as the signal disappears, a countdown
(T) is started. Once the countdown is nished,
contacts 15-18 (25-28) open, and contacts
15-16 (25-26) close. The cycle repeats when
the signal (S) reappears. IMPORTANT! If the
signal (S) is shorter than the time delay (T),
relay will function as if Scenario 3 (Recycle
NO) was selected, switching on at the signal
(S) detection.
One-shot Bi-stable. After the relay is ener-
gized, it remains in a steady state until a signal
(S) is detected. As soon as the signal is de-
tected, contacts 15-16 (25-26) open, contacts
15-18 (25-28) close, and relay remains in this
state. As soon as the second signal is detect-
ed, contacts 15-18 (25-28) open, and contacts
15-16 (25-26) close. Therefore, after detecting
each signal pulse the contacts will switch over
from open to closed and vice versa.
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