Motor Preheat Function - Omron VARISPEED E7 User Manual

Motor Preheat Function

The motor preheat function can be used to prevent e.g. moisture inside the motor due to condensation. Two
different current levels are available. The preheat currents can be set in parameters b2-09 and b2-10 as a per-
centage of the Inverter rated current. Both functions are enabled by digital inputs. If the Drive Enable (H1-
=6A) or Bypass Drive Enable (H1-
the preheat function 2 can then also be activated without enabling the drive.
Related Parameters
Parameter
Number
b2-09
b2-10
Multi-function Digital Inputs (H1-01 to H1-05)
Set value
60
80
The time chart for motor preheat is shown below.
Motor preheat
RUN
Output
frequency
Output
current
6-106
Name
Motor preheat current 1
Motor preheat current 2
Motor preheat 1
Motor preheat 2
b2-03
b2-02
b2-09
Motor
preheat
Fig 6.63 Motor Preheat Function 1 Time Chart
=70) function is used the motor preheat function 2 has to be used,
Setting
Range
0 to 100
0 to 10
Function
E1-09 b2-01
Change
Factory Access
during
Setting Level
Operation
0% No A
5% No A
b2-04
Motor
preheat