Function Of The Timing Relay Function Block - ABB CL Series Applications Manual

Wiring with the logic relay
154

Function of the timing relay function block

Timing relay, on-delayed with and without random
switching
Random switching: The contact of the timing relay switches
randomly within the setpoint value range.
1
2
3
4
t t
s
A B
Figure 62: Signal diagram of timing relay, on-delayed
(with and without random switching)
1: Trigger coil TTx
2: Stop coil HTx
3: Reset coil RTx
4: Switching contact (n/o contact) Tx
t : Setpoint time
s
• Range A: The set time elapses normally.
• Range B: The entered setpoint does not elapse normally because
the trigger coil drops out prematurely.
• Range C: The stop coil stops the time from elapsing.
1SVC 440 795 M0100
t + t = t
1 2 s
C