Bosch Rexroth EFC 3600 - How to Connect and Configure a Potentiometer for Remote Speed Control

Easy Start Guide
Page 8
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Bosch Rexroth EFC 3600 Series Inverter
8. How to connect and configure a Potentiometer
for remote speed control
Parameter
Description
How to set
b0.02
Access to additional parameters
Default is 0 for Basic Parameters. Set at to enable Extended Parameters.2
b1.00
Frequency Setting Source
Set to to enable 0-10V via 10kOhm Potentiometer2
E0.22
Potentiometer Min Speed Hz
Set to for most applications.05.00
E0.24
Potentiometer Max Speed Hz
Set to for most applications.50.00
8.1 Parameters to change for remote Potentiometer speed control
If the integrated dial on the keypad 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 EFC
3600 is cabinet-mounted) or on the machine
itself.
A Potentiometer of rating should be
used.
The number of turns depends on the
application but both single turn and ten turn
Potentiometers are available from The Inverter
Drive Supermarket at InverterDrive.com.
10kOhm
8.2 Connecting the Potentiometer
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 10 volts and should be
connected to the Vr1 terminal at the Inverter
end. It is this voltage which provides the speed
signal with 0V being slowest and 10V fastest.
The default output frequency at 0V is 0Hz. To
change this, edit Parameter E0.22. The default
output frequency at 10V is 50Hz. To change
this, edit Parameter E0.24.
If the rotation of the Potentiometer is the
opposite to that required (ie. turn anti-
clockwise to increase speed instead of
clockwise) reverse connections +10V and
GND.
Use shielded SY cable between Potentiometer
and Inverter and ensure that the cable screen
is connected to the earth IO terminal.
2
1
3
10kOhm
Potentiometer
[Order Code 21302]
Screened
“SY” Cable
1
3
2
Screen to
Earth Terminal
GND
+10VVr1
EFC 3600
I/O Terminal Blocks