Eaton PROFIBUS-DP EZ204-DP User Manual Page 192

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Wiring with EZ
MN05013003E188
Function of the EZ circuit diagram:
Start/stop of the circuit with the external pushbutton actuators
S1 and S2. The mains contactor starts the timing relay in EZ.
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 EZ has an integral time switch, you can combine star-
delta starting with the time switch function. In this case, use
EZ 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 76: Block diagram of the 4x shift register
I1u------TT1
dt1----ÄQ1
dT1----TT2
hT2----ÄQ2
1
234
Storage positions
PULSE VALUE RESET
EZ500_700.book Page 188 Tuesday, May 3, 2005 5:15 PM
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