Mitsubishi Electric 800 Series Instruction Manual page 92

4.3.6
Changing the frequency (60 Hz, initial value) at
the maximum current input (at 20 mA, initial
value)
POINT POINT
Change the maximum frequency.
Changing example 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.
Changing the maximum frequency
1.
Set "50.00 Hz" in Pr.126.
Checking the mode/monitor
2.
Press to change to the monitor / frequency monitor.
Start
Turn ON the start switch (STF or STR), then turn the potentiometer (frequency setting potentiometer) clockwise slowly to full.
3.
(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.
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
Operation
Initial value
60 Hz
Bias
0 20
0 4
Frequency setting signal
0 1
0 2
Pr.904
page 402
page 402
page 402
Basic operation procedure (External operation)
Gain
Pr.126 (Pr.905)
100%
20 mA
5 V
10 V
Pr.905
BASIC OPERATION
4
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