Mitsubishi Electric FR-F800 Series Instruction Manual page 136

4.6.6
• Change the maximum frequency.
The following shows the procedure to change the frequency at 20 mA from 60 Hz (initial value) to 50 Hz using a frequency
setting potentiometer for 4 to 20 mA input. Set 50 Hz in Pr.126 so that the inverter outputs 50 Hz at 20 mA input.
Operating procedure
1.
Selecting the parameter
Turn
Press
2.
Changing the maximum frequency
Turn
Press
3.
Selecting the mode and the monitor item
Press
4.
Start
Turn ON the start switch (STF or STR) to apply a 20 mA current (refer to steps 3 and 4 in 4.6.5).
Operate at 50 Hz.
NOTE
• To change the frequency at the input of 4 mA (minimum current), use the calibration parameter C5.
• Other adjustment methods for the frequency setting current gain are the following: adjustment by applying a current through
terminals 4 and 5, and adjustment using a specified point without applying a current through terminals 4 and 5. (Refer to
357.)
Parameters referred to
Pr.126 Terminal 4 frequency setting gain
C5 (Pr.904) Terminal 4 frequency setting bias
C7 (Pr.905) Terminal 4 frequency setting
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Changing the frequency (60 Hz, initial value) at the
maximum current input (at 20 mA, initial value)
until " " (Pr.126) appears.
to read the present set value (60.00 Hz).
to change the set value to "
to confirm the selection. "
three times to select the monitor mode and to monitor a frequency.
60Hz
(50Hz)
Output frequency
(Hz)
Bias
C5
(Pr.904)
frequencypage 357
frequencypage 357
gainpage 357
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" (50.00 Hz).
" and " "are displayed alternately.
Initial value
0 20
0 4
Frequency setting signal
0 1
0 2
C6(Pr.904)
Gain Pr.126
100%
20mA
5V
10V
C7(Pr.905)
4. BASIC OPERATION
4.6 Basic operation procedure (External operation)
1
2
3
4
5
6
7
8
9
10
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135