Function Applications
-430-
● F0-03 = 0 (non-retentive at power failure): When the AC drive is powered on again after stop or
power failure, the frequency reference is restored to the preset frequency (F0-08). Frequency
modifications made to the preset frequency (F0-08) by using the
and
keys or UP and
DOWN of terminals are cleared when the AC drive stops.
● F0-03 = 1 (retentive at power failure): When the AC drive is powered on again after stop or power
failure, the frequency reference is restored to the value memorized at the moment of the last power
failure. Frequency modifications made to the preset frequency (F0-08) by using the
and
keys or UP and DOWN of terminals remain effective when the AC drive stops.
For example, F0-08 is set to 40 Hz, and it is adjusted to 45 Hz by using the
key of the
operating panel. If F0-23 is set to 0 (non-retentive), the target frequency is restored to 40 Hz (value
of F0-08) after the AC drive stops; if F0-23 is set to 1 (retentive), the target frequency is still 45 Hz
after the AC drive stops.
Note
Distinguish this parameter from F0-23 (Retentive memory of digital setting frequency upon stop). F0-23 determines
whether the frequency setting is retained or cleared after the AC drive stops. F0-23 is related only to the stop state
of the AC drive, rather than power failure.
The related parameters are as follows.
Para. No. Name
Default
Value Range
F0-08
Preset frequency
50.00 Hz
0.00 Hz to maximum
frequency (F0-10)
F0-10
Maximum frequency
50.00 Hz 50.00 Hz to 600.00 Hz
Para. No. Name
Default
Value Range
F0-23
Retention of digital setting
of frequency upon stop
0
0: Non-retentive
1: Retentive
4.1.2.4 AI Control
Three analog inputs can be configured for the drive unit: AI1, AI2, and AI3. You can select the AI source
(F4-25, F4-27, and F4-29) to map the analog data of the power supply unit or extension cards. The
power supply unit and I/O extension cards 1 and 2 each is equipped with two AI terminals. The
following table describes the characteristics of AI terminals of the power supply unit. The AI terminals
of the I/O extension cards are similar.
Table 4–1 Characteristics of AI terminals of the power supply unit
Terminal
Name Type
Input Voltage Range
Input
Impedance
AI1-GND
Control board AI terminal 1 Voltage type
Current type
–10 V to +10 V DC
0 mA to 20 mA
22 kΩ
500 Ω
AI2-GND
Control board AI terminal 2
When the main frequency is to be set through analog input, AI1, AI2, or AI3 can be used. When F0-03 is
set to 2, AI1 is used as the main frequency reference source; when F0-03 is set to 3, AI2 is used as the
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