E6581611
F-83
6
5) Adjusting feedback input
Make adjustment by converting input level of the feedback amount into frequency. Refer to section 6.10.2 for
details.
Example of 0 - 10 Vdc voltage input
setting
Example of 0 - 10 Vdc voltage input
setting
Example of 4 - 20 mAdc voltage input
setting
(60Hz)
(0Hz)
0V
0%
10V
100%
VIA input value
Output frequency
13
(60Hz)
11
(0Hz)
0V
10
0%
5V
12
100%
VIB input value
Output frequency
19
(60Hz)
17
(0Hz)
4mA
16
20%
20mA
18
100%
VIC input value
Output frequency
6) Setting the time elapsed before PID control starts
Waiting time until starting PID control system can be set to avoid PID control until the control system
becomes stable.
The inverter ignores feedback input signals, carries out operation at the frequency determined by the
frequency command value for the period of time specified with f359, and enters the PID control mode
after the elapsed time.
7) PID control forward/reverse characteristic switch
PID input characteristics can be reversed.
Process quantity
Feedback amount
×(-1)
PID
Output
Opposite characteristic
Original characteristic
Characteristic selection (parameter or terminal input)
When characteristic is reversed according to parameters, set PID calculation reverse selection parameter
f380 is 1: Set reverse characteristics.
When characteristic is reversed using logic input terminal, assign function number 54/55, PID
characteristics switching, to an input terminal.
Note) If reverse characteristics is selected for parameter f380 and terminal input at the same time,
they become forward characteristic.
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