GE Industrial Solutions AF-300 G11 - Manual (Page 68)

5-15
Data subject to change without notice 7/07. © 2007 GE Drives
F23 Starting frequency (frequency)
F24 Start frequency (Holding time)
F25 Stop frequency
F 2 3 S T A R T H z
Setting range: 0.1 to 60 Hz
The starting frequency can be set to reserve the torque
at startup and can be sustained until the magnetic flux of
the motor is established.
Frequency: This function sets the frequency at startup.
F 2 4 H O L D I N G t
Setting range: 0.1 to 10.0 seconds
Holding time: This function sets the holding time during
which the start frequency is sustained at startup.
The holding time does not apply during switching
between forward and reverse.
The holding time is not included in the acceleration time.
The holding time also applies when pattern operation
(C21) is selected. The holding time is included in the
timer value.
F 2 5 S T O P H z
Setting range: 0.1 to 6.0 Hz
This function sets the frequency at stop.
The operation will not start if the starting frequency is
less than the stopping frequency or if the set frequency
is less than the stopping frequency.
F26 Motor sound (carrier frequency)
F 2 6 M T R S O U N D
This function adjusts the carrier frequency to prevent
resonance with the machine system, reduce motor and
drive noise, and also reduce leakage current from output
circuit wiring.
Drive Capacity Setting Range
75 Hp or less 0.75 to 15kHz
100 Hp or more 0.75 to 10kHz
Carrier frequency Low — High
Motor noise High — Low
Output current waveform Bad — Good
Leakage current Small amount Large amount
Noise occurrence Extremely low High
1. Reducing the set value adversely affects the output
current waveform (i.e., higher harmonics), increases
motor loss, and raises motor temperature. For
example, at 0.75 kHz, reduce the motor torque by
about 15%.
2 Increasing the set value increases drive loss and
raises drive temperature.
F27 Motor sound (sound tone)
F 2 7 M T R T O N E
Setting range: 0 , 1, 2 , 3
The tone of motor noise can be altered if the carrier
frequency is 7 kHz or lower. Use this function as required.
F30 FMA terminal (voltage adjustment)
F31 FMA terminal (function selection)
F 3 0 F M A V – A D J
Setting range: 0 to 200%
Monitor data (e.g.,output frequency, output current) can be
output to terminal FMA as a DC voltage. The amplitude of
the output can also be adjusted.
This function adjusts the voltage value of the monitor item
selected in F31 when the monitor amount is 100%. A
value from 0 to 200% can be set in 1% increments.
F 3 1 F M A F U N C
This function selects the monitor item to be output to
Terminal FMA.
Value Monitor Item 100% Monitor Amount
0 Output frequency 1 Maximum output
(before slip frequency
compensation)
1 Output frequency 2 Maximum output
(after slip frequency
compensation)
2 Output current 2x rated output current of drive
3 Output voltage 230V series: 250V
460V series: 500V
4 Output torque 2x rated motor torque
5 Load rate 2x rated load of motor
6 Output 2x rated drive output
7 PID feedback amount Feedback amount at 100%
8 PG feedback amount Synchronous speed at
(only when option maximum frequency
is installed)
9 DC link circuit voltage 230V series: 500V
460V series: 1,000V
10 Universal AO Output from RS485 or Bus option