ABB CL Series - Page 258

Function blocks
255
1SVC 440 795 M1100
Figure: 134: Signal diagram of timing relay, off-delayed
(with/without random switching, with/without
retriggering)
• Range E:
The trigger coil drops out twice. The set time t
s
consists of t
1
plus
t
2
(switch function not retriggerable).
•Range F:
The trigger coil drops out twice. The actual time t
1
is cleared and
the set time t
s
elapses completely (retriggerable switch function).
Timing relay, on-delayed and off-delayed with and
without random switching
Time value >I1: On-delay time
Time value >I2: Off-delay time
Random switching
The contact of the timing relay switches randomly within the
setpoint value ranges.
E
t
1
+ t
2
= t
s
1
2
4
3
t
s
F
t
1