Easy Start Guide
5. How to set “Motor no-load current” - H34
LS Industrial Systems SV-iC5
This guide has been produced by The Inverter Drive Supermarket Ltd.
All content, including but not limited to graphics, text and procedures copyright
The Inverter
Drive Supermarket and must not be reproduced or altered without prior written permission.
©
NPN
PNP
RUN
STOP/RST
FWD
REV
min
max
NPN
PNP
RUN
STOP/RST
FWD
REV
min
max
5.1.1 Use the dial to set the frequency to 50Hz and start
the motor.
Turn the dial clockwise until the display shows 50.0 as
illustrated opposite. Then press the green “Run” button to
start the motor. As the motor accelerates the display will
track frequency from 0.0 to 50.0.
Once the Inverter has reached 50.0Hz proceed to the step
below.
Motor no-load current can only be determined with the
motor running off-load. Decouple the motor from the
machine before beginning!
5.1.2 Use the navigation pad to locate the “CUr”
parameter.
Make a note of this value. It is “Motor no-load current”
in Amps and must be set in parameter H34.
Press the down arrow on the navigation pad until “CUr” is
displayed (as shown opposite). “CUr” is a read-only
parameter which displays output current in Amps.
Press the navigation pad to select “Cur”. The output current
will be displayed.
Motor no load current is an important
parameter to set to get the best possible motor
performance.
Correctly set, it allows the Inverter to maintain
the precise output current to suit the motor and
significantly improves torque at lower speeds.
The procedure involves running the motor off-
load at it’s rated speed and making a note of
output current. This value is then set in
parameter H34.
Once set, this can be confirmed by running the
motor off-load at 50Hz and 5Hz and noting that
the output current is the same in both cases.
5.1 How to determine “Motor no-load current” by operating the iC5.
Page 5
