Adjustment Suggestions - Omron VARISPEED E7 User Manual

Adjustment Suggestions

If hunting, vibration or other problems occur during trial operation, adjust the parameters listed in the follow-
ing table according to the control method. This table lists the most commonly used user parameters only.
Table 4.4 Useful Parameters in case of Problems during Trial Operation
Name (Parameter
Number)
Hunting-prevention
gain (N1-02)
Carrier frequency selec-
tion
(C6-02)
Torque compensation
delay time constant
(C4-02)
Torque compensation
gain (C4-01)
Middle output fre-
quency voltage
(E1-08)
Minimum output fre-
quency voltage
(E1-10)
*1. The setting is given for 200 V Class Inverters. Double the voltage for 400 V Class Inverters.
The following user parameters will also affect the control system indirectly.
Name (Parameter Number)
Acceleration/deceleration times
(C1-01 to C1-09)
S-curve characteristics (C2-01 and C2-02)
Jump frequencies (d3-01 to d3-04)
Analog input filter time constant (H3-12)
Stall prevention (L3-01 to L3-06)
Factory Set-
Performance
ting
Controlling hunting and
vibration in middle-
1.00
range speeds
(20 to 80% FMAX)
• Reducing motor mag-
netic noise
Depends on
• Controlling hunting
capacity
and vibration at low
speeds
• Increasing torque and
speed response Depends on
• Controlling hunting capacity
and vibration
• Improving torque at
low speeds (10 Hz or
lower) 1.00
• Controlling hunting
and vibration
• Improving torque at
Depends on
low speeds
capacity and
• Controlling shock at
voltage
startup
Table 4.5 Parameters influencing performance indirectly
Adjust torque during acceleration and deceleration.
Used to prevent speed shock at start or stop of the acceleration.
Used to avoid resonance points during constant speed.
Used to prevent fluctuations in analog input signals caused by noise.
Used to prevent OV (overvoltage error) and motor stalling for heavy
loads or rapid acceleration/deceleration. Stall prevention is enabled by
default and the setting normally has not to be changed. When using an
optional braking resistor unit and braking unit, however, disable stall pre-
vention during deceleration by setting L3-04 to 0.
Adjustment Suggestions
Recommended
Adjustment Method
Setting
• Reduce the setting if torque is
insufficient for heavy loads.
0.50 to 2.00
• Increase the setting if hunting or
vibration occurs for light loads.
• Increase the setting if motor
magnetic noise is high.
0.4 kHz to
• Reduce the setting if hunting or
default
vibration occurs at low to mid-
dle-range speeds.
• Reduce the setting if torque or
speed response is slow.
200 to 1000 ms
• Increase the setting if hunting or
vibration occurs.
• Increase the setting in small
steps of 0.05 if torque is insuffi-
0.50 to 1.50 cient at low speeds.
• Reduce the setting if hunting or
vibration occurs for light loads.
• Increase the setting in small
Default to
steps of 1 or 2 V if torque is
"Default + 3 to 5
insufficient at low speeds
*1
• Reduce the setting if shock at
V"
startup is large.
Application
4-11