Omron VARISPEED E7 User Manual page 157

Time Chart
The following figure shows the frequency characteristics when L3-01 is set to 1.
Setting Precautions
If the motor capacity is small compared to the Inverter capacity or if the inverter is operated using the fac-
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tory settings and the motor stalls, lower the set value of L3-02.
If using the motor in the field weakening range, L3-02 will be automatically lowered to prevent stalling. It
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6
will be reduced to a fixed value of 50 % of the inverter rated current.
Set the parameters as a percentage taking the inverter rated current to be 100%.
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18
6-
Output current
Stall level during
acceleration
L3-02
85% of
L3-02
Output frequency
*1
*1 The acceleration rate is lowered
*2 The acceleration rate is stopped to reduce the output current
*3 The acceleration is restarted
Fig 6.19 Time Chart for Stall Prevention During Acceleration
Stall Prevention Level
during Acceleration
E1-06
Base Frequency (FA)
Fig 6.20 Stall Prevention Level and Limit During Acceleration
Time
*2 *3
Time
L3-02
50% of inverter
rated current
Output frequency