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Start and stop using terminals (External
operation)
4
DRIVING THE MOTOR
4.5.6 Changing the frequency (60Hz, initial value) at the maximum current input
(at 20mA, initial value)
<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) or "2".
Use to lit [EXT].
Check that the AU signal is ON.
Turn the AU signal ON.
Check that wiring is correct. Check it again.
Change the frequency (0Hz) at the minimum current input (at 4mA, initial value)
Adjust the frequency in calibration parameter C5 Terminal 4 frequency setting bias frequency.
(Refer to Chapter 4 of 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.
The frequency meter (indicator) connected across terminals FM and SD does not indicate exactly 50Hz ... Why?
The meter can be adjusted by calibration parameter C0 FM terminal calibration.
(Refer to Chapter 4 of the Instruction Manual (Applied).)
Set frequency at 4mA using calibration
parameter C5 and adjust the indicator using
calibration parameter C0.
(Refer to Chapter 4 of 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 and 5 and adjust at any point without a voltage applied.
(Refer to Chapter 4 of 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.
DisplayOperation
2.
Press to show the currently set value.
(60.00Hz)
3.Turn to change the set value to " ".
(50.00Hz)
Flicker ··· 50Hz output at 20mA input complete!!
(Refer to 4.5.5 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) C7 (Pr. 905)
60Hz