Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 92 / 727

Basic operation procedure (External operation)
BASIC OPERATION
91
4
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.
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 page 402
Pr.904 Terminal 4 frequency setting bias frequency page 402
Pr.905 Terminal 4 frequency setting gain page 402
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 .
Operation
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), then turn the potentiometer (frequency setting potentiometer) clockwise slowly to full.
(Refer to steps 3 and 4 in 4.3.5.)
Operate at 50 Hz.
60 Hz
0
Frequency setting signal
100%
Initial value
Bias
0
20
4 20 mA
Output frequency
(Hz)
Pr.126 (Pr.905)
Gain
Pr.904
Pr.904 Pr.905
0 1 5 V
0 2 10 V