Notch Filter (Pr.862, Pr.863, Pr.871) - Mitsubishi Electric FR-E700EX Instruction Manual

4.4.6

Notch filter (Pr.862, Pr.863, Pr.871)

The response level of speed control in the resonance frequency band of mechanical systems can be lowered to
avoid mechanical resonance.
Parameter
Name
number
862 Notch filter frequency
863 Notch filter depth
871 Notch filter width
 The mechanical resonance frequency is suppressed by setting the mechanical resonance frequency in Pr.862 Notch filter
frequency and adjusting Pr.863 Notch filter depth and Pr.871 Notch filter width.
 If the mechanical resonance frequency is unknown, lower the notch frequency in order from the highest. The point where
the resonance is smallest is the optimum setting for the notch frequency.
 In Pr.863 Notch filter depth, a deeper notch depth has a greater effect in reducing mechanical resonance, but because the
phase delay is larger, vibration may increase. Adjust by starting from the shallowest value.
 In Pr.871 Notch filter width, a wider notch width has a greater effect in reducing mechanical resonance, but because the
phase delay is larger, vibration may increase. Adjust by starting from the narrowest value.
Gain
0dB
Initial value Setting range
0
10 to 625Hz
0
0
Pr.862 Notch filter frequency
Pr.863 Notch filter depth
0 No notch filter
Set the frequency for the center of gain attenuation.
0 (Deep) 3 (Shallow)
0 to 3
0 (Narrow) 3 (Wide)
0 to 3
Pr.871 Notch filter width
Speed control
Description
Frequency
4
85