ABB ACS 300, Руководство пользователя

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ACS 300 User’s Manual 63
Chapter 7 - Drive Parameters
The following is an alternative way to enter the LOW and HIGH
settings for critical frequency:
• Run the drive with external reference.
• Using the analogue input, set the frequency to the critical
frequency LOW value.
• Go to parameter CRIT f1L on Page 2.
• Press and hold the key for three seconds.
• The ACS 300 will respond by updating the frequency setting to
the current value. The CRIT f1L is now set.
• Increase the analogue input reference so that the output
frequency is just above the critical frequency span.
• Go to parameter CRIT f1H on Page 2.
• Press and hold the key for three seconds.
• The ACS 300 will respond by updating the frequency setting to
the current value. The CRIT f1H is now set.
Repeat the procedure for the second critical frequency range if
necessary. To erase the critical frequencies, set both to 0 Hz.
IR COMP This parameter allows extra torque at speeds between 0.1 Hz
and the nominal motor speed. The parameter differs from the
AUTO BOOST option of the START parameter in that it is always
valid in the 0.1 Hz to nominal motor speed range.
Keep the compensation voltage as low as possible for the
application, as the motor will overheat rapidly or an overcurrent
fault may occur if a high level of compensation is applied.
Small motors can take higher compensation than larger motors
because the winding resistance is higher in small motors. If the
motor must drive a load with a high starting torque, we
recommend using AUTO BOOST starting. If you have trouble
with motor overheating, use a motor with more poles and run at a