5-30
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chap. 5 FUNCTION CODES
Setting up a reference frequency
[ 1 ] Using the keypad (F01 = 0 (factory default) or 8)
(1) Set F01 data to "0" or "8." This can be done only when the inverter is in Running mode.
(2) Press the
/ key to display the current reference frequency. The lowest digit on the LED monitor will blink.
(3) To change the reference frequency, press the
/ key again. To save the new setting into the inverter's
memory, press the
key (when E64 = 1 (factory default)). When the power is turned ON next time, the new
setting will be used as an initial reference frequency.
• In addition to the saving with the
key described above, auto-saving is also available (when E64 = 0).
• If you have set F01 data to "0" or "8," but have selected a frequency command source other than
frequency command 1 (i.e., frequency command 2, frequency command via communication, o
multi-frequency command), then the
and keys are disabled to change the current frequency
command even in Running mode. Pressing either of these keys just displays the current reference
frequency.
• When you start specifying the reference frequency or any other parameter with the
/ key, the
least significant digit on the display blinks; that is, the cursor lies in the least significant digit. Holding
down the
/ key changes data in the least significant digit and generates a carry, while the curso
remains in the least significant digit.
• While the least significant digit is blinking by pressing the / key, holding down the key fo
more than 1 second moves the cursor from the least significant digit to the most significant digit. Furthe
holding it down moves the cursor to the next lower digit. This cursor movement allows you to easily
move the cursor to the desired digit and change the data in higher digits.
• Setting F01 data to "8" enables the balanceless-bumpless switching. When the frequency command
source is switched to the keypad from any other source, the inverter inherits the current frequency tha
has applied before switching, providing smooth switching and shockless running.
[ 2 ] Using analog input (F01 = 1 to 3, or 5)
When any analog input (voltage input to terminals [12] and [V2], or current input to terminal [C1]) is selected by F01, it
is possible to arbitrarily specify the reference frequency by multiplying the gain and adding the bias. The polarity can be
selected and the filter time constant and offset can be adjusted.
Adjustable elements of frequency command 1
Bias Gain
Data for
F01
Input terminal Input range
Bias
Base
point
Gain
Base
point
Polarity
Filter
time
constant
Offset
1 [12]
0 to +10 V,
-10 to +10V
F18 C50 C32 C34 C35 C33 C31
2 [C1] 4 to 20 mA F18 C50 C37 C39 - C38 C36
0 to +10 V,
-10 to +10 V
F18 C50 C32 C34 C35 C33 C31
3
[12] + [C1]
(Sum of the two values)
4 to 20 mA F18 C50 C37 C39 - C38 C36
5 [V2]
0 to +10 V,
-10 to +10 V
F18 C50 C42 C44 C45 C43 C41
Offset (C31, C36, C41)
C31, C36 or C41 specifies an offset for analog input voltage or current. The offset also applies to signals sent from the
external equipment.
Filter time constant (C33, C38, C43)
C33, C38, or C43 specifies a filter time constant for analog input voltage or current. Choose an appropriate value for the
time constant taking into account the response speed of the mechanical system since a large time constant slows down
the response. When the input voltage fluctuates due to noise, specify a larger time constant.
Polarity (C35, C45)
C35 or C45 specifies the input range for analog input voltage.
Data for C35/C45 Terminal input specifications
0
-10 to +10 VDC
1
0 to +10 VDC (negative value of voltage is regarded as 0 V)
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
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