7 Applications
7.5 Motor potentiometer
DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com 127
7.5 Motor potentiometer
The function of an electronic motor potentiometer for entering setpoints can
be set with parameters P-12, P-15 and P-31.
Example
P-12 = 2; P-15 = 0; P-31 = 2 or = 3
Figure 79: Motor potentiometer for
both operating directions (FWD / REV)
The start enable signal is issued with a continuous signal at control signal
terminal 2 (DI1); the operating direction (FWD or REV) is selected with
control signal terminal 6 (DI4).
The frequency reference value can then be increased with a pulse on
terminal 3 (DI2) (UP). The acceleration will be based on the time set in
P-03 (acc1) and go all the way to just under the maximum output frequency
set in P-01.
Parameter P-31 is used to define the behavior of the variable frequency drive
in the event of a restart:
• P-31 = 2: The variable frequency drive will start off from the minimum
frequency (P-02).
• P-31 = 3: The variable frequency drive will store the set value and start
from the previously set frequency reference value.
The frequency reference value set here will be retained even after the
supply voltage is switched off.
Control signal terminal 4 (DI3) can be used to reduce the configured
frequency reference value of the motor potentiometer (DOWN). The deceler-
ation will take place using the time set in P-04 (dec1) all the way to 0 Hz if a
minimum frequency has not been set in P-02.
￫
For more information, please refer to application note
AP040042.
DI1 DI2 DI3 DI4
23
START
UP
+24 V
1
4
DOWN
6
FWD/REV
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