Rockwell Automation 1302 575v AC Drive - Canada Only User Manual

Page 74

8–16

Programming

Publication 1302-5.0 — January, 1998

FĆ22 Avoidance Bandwidth

This parameter sets the

avoidance bandwidth. Any

frequency that falls within the

avoidance band results in a

generated frequency below the

bandwidth.

Parameter Range:

Default Setting:

Step Size:

0 to 30 Hz (0 = avoidance frequency

disabled)

0.10 Hz

This parameter is used with parameter FĆ21 (Avoidance Frequency). The Drive can accelerate and

decelerate through the avoidance band. However, it cannot operate at a steady state at any of the

avoidance band frequencies. Setting FĆ22 to 0 disables the avoidance frequency.

Example

Assume:

Minimum Speed (FĆ03) = 3 Hz

Maximum Speed (FĆ04) = 60.0 Hz

Avoidance Frequency (FĆ21) = 32.2 Hz

Avoidance Bandwidth (FĆ22) = 4 Hz

Avoidance band = 30.2 to 34.2 Hz

Requested Output

Frequency

Output Frequency After

Avoidance Band Correction

25.0 Hz

30.0 Hz

31.0 Hz

30.2 Hz

32.0 Hz

30.2 Hz

34.0 Hz

30.2 Hz

34.2 Hz

30.2 Hz

34.3 Hz

35.0 Hz