4 Operation
4.3 Commissioning with control signal terminals (default settings)
DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com 133
The start release is done by actuating one of the digital inputs with +24 V:
• Terminal 2: FWD = Clockwise rotating field (Forward Run)
• Terminal 3: REV = Counterclockwise rotating field (Reverse Run)
The FWD and REV control commands are interlocked (exclusive OR) and
require a rising voltage edge.
The frequency is shown with a minus sign with a start release with a left
rotating field (REV).
You can now set the output frequency (0 - 50 Hz) and, as a result, the
speed of the connected three-phase motor (0 - n
Motor
) by using the
potentiometer via terminal 6 (0 - +10 V proportional voltage signal). The
change in output frequency here is delayed based on the specified
acceleration and deceleration ramps.
In
the
default
settings,
these times
are set to 5 seconds and to 10 seconds from a frame size FS4.
The acceleration and deceleration ramps specify the time change for the
output frequency: from 0 to f
max
(WE = 50 Hz) or from f
max
back to 0.
Figure95 shows a good example of the process, if the release signal (FWD/
REV) is switched on and the maximum setpoint voltage reference voltage
(+10 V) is applied. The speed of the motor follows the output frequency
depending on the load and moment of inertia (slip), from zero to n
max
.
If the release signal (FWD, REV) is switched off during operation, the inverter
is blocked immediately (STOP). The motor comes to an uncontrolled stop
(see in Figure95).
The acceleration time is set in parameter P1-03.
Figure 95:Start-Stop command with maximum reference voltage
t
t
f
max
~ n
max
f
P1-03
FWD
REV
+24 V
= 50 Hz
0
P1-07
①
RUN STOP
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