Delta Electronics VFD-M Series User Manual page 119

Chapter 4 Parameters|
Pr. 152
Skip Frequency Width
Settings 0.00 to 400.00Hz
Pr. 153
Bias Frequency Width
Settings
Frequency of Δ top point Fup= master frequency F + Pr.152 + Pr.153.
Frequency of Δ down point Fdown= master frequency F – Pr.152 – Pr.153.
Master
Frequency
(F)
Pr. 154
Reserved
Pr.155
Compensation Coefficient for Motor Instability
Settings 0.1 to 5.0 (recommended setting 2.0)
0.0 Disable
This parameter is used to improve a condition of unstable current in any specific area. For
higher frequencies, you can adjust this parameter to 0.0, and increase the setting value in
Pr.155 for 30HP and above (a setting of 2.0 is recommended).
Pr.156
Communication Response Delay Time
Settings 0 to 200 (x500µs)
This parameter is used to set communication response delay time. If you set Pr. 156 to 1 the
communication response delay time will be 1 X 500µs=500µs, set Pr. 156 to 2 the
communication response delay time will be 2 X 500µs=1000µs.
Pr.157
Communication Mode Selection
Settings 0
1
4-84
0.00 to 400.00Hz
Pr.152
Pr.10, 12
Pr.11, 13
Delta ASCII
MODBUS
Double Pr. 153
Factory Setting: 0.00
Factory Setting: 0.00
Fup
Fdown
Factory Setting: 0.0
Factory Setting: 0
Factory Setting: 1
Revision May 2008, ME14, SW V3.04