Easy Start Guide
Page 9
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9. How to connect and configure a Potentiometer
for remote speed control
Parameter
Description
How to set
Pr. 59
Remote setting function
Default is 0. Set to
to enable frequency setpoint via Analogue input terminal 2.
1
Pr. 73
Analogue input selection
Set to
for 5V (default).
1
Pr. 79
External operation mode
Set to
to use the Potentiometer as the speed reference with Start/Stop via Inverter keypad.
4
Set to 0 to use the Potentiometer as the speed reference with Start/Stop via external controls.
9.1 Parameters to change for remote Potentiometer speed control
If speed control via the integrated dial is
unsuitable for the application, a remote
Potentiometer can be used instead.
This provides the benefit of allowing motor
speed to be controlled from a more convenient
location such as a cabinet door (if the D700 SC
is cabinet-mounted) or on the machine itself.
A Potentiometer of
rating should be
1kOhm
used.
The number of turns depends on the
application. A single turn Potentiometer is
available from The Inverter Drive Supermarket
at InverterDrive.com.
9.2 Connecting the Potentiometer
First, ensure the Voltage/Current Input switch
is set to “V” (Voltage).
A wiring diagram is shown in the illustration
opposite. The most important connection at
the Potentiometer end is the centre terminal or
“wiper”. The wiper will output a variable voltage
between 0 and 5 volts and should be
connected to the “2" terminal on the Inverter. It
is this voltage which provides the speed signal
with 0V being slowest and 5V fastest.
The default output frequency at 0V is the
minimum frequency of the Inverter. To change
this, edit Parameter 2. The default output
frequency at 5V is 50Hz. To change this, edit
Parameter 125.
If the rotation of the Potentiometer is the
opposite to that required (ie. turn anti-
clockwise to increase speed instead of
clockwise) reverse connections 10 and 5.
Use shielded SY cable between Potentiometer
and Inverter and ensure that the cable screen
is connected to the Inverter earth terminal.
2
1
3
Screened
“SY” Cable
Mitsubishi D700-SC Series Inverter
1kOhm
Potentiometer
[Order Code 31137]
Screen to
Earth Terminal
V I
Voltage/Current
Input Switch
2
1
3
