Omron VARISPEED L7 User Manual

4-11
4
Performance Optimization
The following table gives adjustment advice for performance improvement after the basic setup has been
done.
Table 4.3 Performance Optimization
Problem Possible Reason Countermeasure
Rollback at start
V/f and
OLV
• Too less torque when the brake opens
• Increase the DC injection current at
start in parameter S1-02.
• Set the DC injection time at start S1-
04 as short as possible, but make
sure, that brake opens completely
before the motor starts to turn.
• Increase the minmum (E1-10) and
medium (E1-08) V/f pattern voltages.
Make sure, that the starting and level-
ing current does not rise too high.
CLV
• Too slow ASR response when the brake
opens.
• Increase the ASR gain at start (C5-
03) and decrease the ASR I time at
start (C5-04). If vibrations occur set
the values back in small steps.
• Increase the Zero servo gain in
parameter S1-20.
Common
• Motor torque is not fully established when
the brake opens.
• Lengthen the brake release delay
time S1-06 and the DC injection/
zero servo time at start S1-04
• Motor contactors close too late
• Make sure, that the contactors are
cosed before the Up/Down com-
mand is set.
Jerk at start
Common
• Motor starts turning when the brake is not
completely opened or runs against the
brake
• Increase the DC injection time at start
S1-04.
• Too fast acceleration rate change • Increase the S-Curve at start C2-01
Vibrations in low
and medium speed
area
V/f
• Too high output voltage
• Reduce the V/f pattern settings (E1-
08 / E1-10)
OLV
• Too fast torque compensation
• Increase the torque compesation
delay time (C4-02)
• Too high output voltage
• Reduce the V/f pattern settings (E1-
08 / E1-10)
CLV
• Too high ASR settings
• Decrease C5-01 / C5-03 and increase
C5-02 / C5-04
• Wrong motor slip value
• Check the motor slip value in param-
eter E2-02. Increase or decrease it in
steps of 0.2 Hz.
Vibrations in the
high and top speed
area
OLV
• Too fast torque compensation
• Increase the torque compesation
delay time (C4-02)
CLV
• Too high ASR settings
• Decrease C5-01 / C5-03 and increase
C5-02 / C5-04

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English