Sinee EM500 - Page 209

EM500 Open-Loop Vector Control Inverter User Manual
209
after the set time is out. If F04.04=0.00, DC brake is disabled at start.
★ The process of starting DC brake is shown in Figure 7-18.
This function may be enabled when the single inverter serves multiple
motors and inverter is starting
No.
Function
Range
Unit
Default
Type
F04.06
Pre-Excitation
Current
50.0 - 500.0 (100.0=Idling
Current)
%
100.0
〇
F04.07
Pre-Excitation
Time
0.00 - 10.00
s
0.10
〇
Inverter develops a magnetic field as the set pre-excitation current, and starts
running after the set pre-excitation time (F04.07) is out. If the set pre-excitation is 0,
inverter will start directly without the pre-excitation link.
F04.06 pre-excitation current is a percentage relative to motor’s rated no load
current.
No.
Function
Range
Unit
Default
Type
F04.08
Rotation Speed
Tracking Method
0: Start from Maximum
Frequency
1: Start from Stop
Frequency
2: Start from Power
frequency
0
〇
When the starting mode is selected as the torque tracking start (F04.00=1), inverter
will perform the torque tracking as per the setting through F04.08 at start. Please select a
proper mode according to the working condition, so as to better track present motor
running frequency.
This mode can be selected when inverter starts tracking downwards from the
maximum frequency (F04.08=0) and the running status of motor is completely unsure
(motor is in rotation status when inverter is powered on).
；
If F04.08=1, it means that inverter starts tracking from the stop frequency. Generally,
this mode is selected;
If F04.08=2, it means that inverter starts tracking from the power frequency. This
mode can be selected if the power frequency changes to the frequency conversion.