Mitsubishi Electric 800 Series Instruction Manual page 104

4.3.6 Changing the frequency (60 Hz, initial value) at the
maximum current input (at 20 mA, initial value)
• Change the maximum frequency.
With a 4 to 20 mA input frequency setting potentiometer, change the frequency at 20 mA from 60 Hz (initial value) to 50 Hz.
Adjust the setting so that the inverter outputs 50 Hz when 20 mA is input. Set "50 Hz" in Pr.126.
Operating procedure
1.
Changing the maximum frequency
Set "50.00 Hz" in Pr.126.
2.
Checking the mode/monitor
Press to change to the monitor / frequency monitor.
3.
Start
Turn ON the start switch (STF or STR) to input a 20 mA current. (Refer to steps 3 and 4 in 4.3.5.)
Operate at 50 Hz.
NOTE
• To set the frequency at 4 mA, use the Pr.904.
• 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.
Parameters referred to
Pr.126 Terminal 4 frequency setting gain frequency
Pr.904 Terminal 4 frequency setting bias frequency
Pr.905 Terminal 4 frequency setting gain
60 Hz
Output frequency
(Hz)
Bias
Pr.904
0 20
0 4
Frequency setting signal
0 1
0 2
Pr.904
page 328
page 328
page 328
Initial value
Gain
Pr.126 (Pr.905)
100%
20 mA
5 V
10 V
Pr.905
4.3 Basic operation procedure (External operation)
3
4
5
4
5
6
7
8
9
10
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4. BASIC OPERATION