49
Operation by the start command of the
terminal block (external operation)
3
D
R
IVE
TH
E M
O
T
O
R
3.6.6
Change the frequency (60Hz) of the maximum value of potentiometer (at 20mA)
<How to change the maximum frequency?>
The motor will not rotate ... Why?
Check that [EXT] is lit.
[EXT] is valid when
Pr. 79
= "0" (initial value).
Use
to lit [EXT].
Check that the AU signal is on.
Turn the AU signal on.
Check that wiring is orrect. Check it again.
Change the frequency (0Hz) of the minimum value of potentiometer (at 4mA)
Adjust the frequency in
calibration parameter C5 Terminal 4 frequency setting bias frequency
.
(Refer to the Instruction Manual (applied).)
Changing example
When you want to use the 4 to 20mA input frequency setting potentiometer to change the
20mA-time frequency from 60Hz (initial value) to 50Hz
Adjust to output 50Hz at 20mA current input.
Set "50Hz" in
Pr. 126
.
(error at writing) is displayed.
The gain and bias frequency settings are too close.
Set frequency at 4mA using
calibration
parameter C5
and adjust the indicator using
calibration parameter C0
.
(Refer to the Instruction Manual (applied).)
REMARKS
As other adjustment methods of frequency setting voltage gain, there are methods to adjust with a voltage applied to across
terminals 4-5 and adjust at any point without a voltage applied.
(Refer to
the Instruction Manual (applied)
for the setting method of
calibration parameter C7
.)
PU
EXT
4.
Press to set the value.
6.
Turn the start switch (STF or STR) on to allow
20mA current to flow.
1.
Turn until (
Pr. 126
) appears.
5.
Mode/monitor check
Press twice to choose the
monitor/frequency monitor.
Display
Operation
2.
Press to show the currently set value.
(60.00Hz)
3.
Turn to change the set value to "50.00".
(50.00Hz)
Flicker
···
50Hz output at 20mA input complete!!
(Refer to 3.6.5 steps 2 to 5)
Output frequency
(Hz)
Pr.126
0
Frequency setting signal
100%
Initial value
Bias
Gain
0
20
4
20mA
C5
(Pr.904)
C6
(Pr.904)
(Pr.905)
C7
60Hz
Summary of Contents for FR-F700 Series
Page 134: ...MEMO ...
