Wiring with the logic relay
186
1SVC 440 795 M0100
Function of the CL circuit diagram:
Start/Stop of circuit with the external actuators S1 and S2.
The mains contactor starts the timing relay in the logic relay.
• I1: Mains contactor switched on
• Q1: Star contactor ON
•Q2: Delta contactor ON
• T1: Star-delta changeover time (10 to 30 s, X)
• T2: Wait time between star off, delta on
(30, 40, 50, 60 ms, X)
If your logic relay has an integral time switch, you can combine
star-delta starting with the time switch function. In this case,
use the logic relay to switch the mains contactor as well.
4x shift register
You can use a shift register for storing an item of
information, such as for the sorting of parts into good and
bad, for two, three or four transport steps further on.
A shift pulse and the value (0 or 1) to be shifted are needed
for the shift register.
The shift register’s reset input is used to clear any values that
are no longer needed. The values in the shift register go
through the register in the order: 1st, 2nd, 3rd, 4th storage
location.
Figure 75: Block diagram of the 4x shift register
I1u------DD1
dt1----ÄQ1
dT1----DD2
hT2----ÄQ2
1
234
Storage positions
PULSE VALUE RESET
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