Prohibit Frequencies - Honeywell NXL Series Applications Manual

Honeywell

2.5.1

Prohibit frequency area 1; Low limit

2.5.2

Prohibit frequency area 1; High limit

In some systems it may be necessary to

avoid certain frequencies because of

mechanical resonance problems. With

these parameters it is possible to set a limit

for the "skip frequency" region. See Figure

1- 14.

2.5.3

Acceleration/deceleration ramp speed scaling ratio between prohibit frequency limits

Defines the acceleration/deceleration time when the output frequency is between the selected

prohibit frequency range limits (parameters 2.5.1 and 2.5.2). The ramping time (selected

acceleration/ deceleration time 1 or 2) is multiplied with this factor. E.g. value 0.1 makes the

acceleration time 10 times shorter than outside the prohibit frequency range limits.

Figure 1- 15. Ramp time scaling between prohibit frequencies

Description of parameters

fout [Hz]

Par. 2.5.3 = 0,2

Par. 2.5.2

Par. 2.5.1

Output

frequency [Hz]

2.5.1

Figure 1- 14. Prohibit frequency area setting.

Par. 2.5.3 = 1,2

Time [s]

nxlk37.fh8

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2.5.2

Reference [Hz]

NX12K33

4