SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 8 Applied Functions
For example, if APP-20 Ref Source is selected as No. 1 V1 terminal, the inputs other than V1 should be selected in APP-
21 PID F/B Source. Set as No. 18 PID Fdb Value of CNF-06~08, the feedback can be monitored.
APP-22 PID P-Gain, APP-26 P Gain Scale : Sets the output ratio of the difference(error) between the reference and
feedback. If P gain is set at 50%, 50% of the error is output. The setting range of P gain is 0.0~1000.0%. If a ratio lower
than 0.1% is necessary, use P Gain Scale of APP-26.
APP-23 PID I-Time : Sets the times for output of accumulated errors. This sets the time for 100% output when the error is
100%. If the integral time(PID I-Time) is set at 1 second, 100% is output after 1 second when the error is 100%. The
normal error can be reduced by the integral time. If the multi-function terminal block function is set at 21 I-Term Clear and
the terminal block is ON, all the accumulated integral amount is deleted.
APP-24 PID D-Time : Sets the output of the error change rate. If the differential time(PID D-Time) is set at 1mSec, 1% is
output per 10mSec when the error change rate per second is 100%.
APP-25 PID F-Gain : The set goal can be added to the PID output and the ratio is set. This can obtain a rapid response
characteristic.
APP-27 PID Out LPF : This is used when the entire system is instable because the PID controller output changes too fast
or there is too much oscillation. Normally the responsiveness is enhanced by using a low value(the initial value is 0) but the
stability can also be improved by using a higher value. The higher a value is used, the more stable the PID controller
output is but the responsiveness might be down.
APP-29 PID Limit Hi, APP-30 PID Limit Lo : Limits the output of the PID controller.
APP-32 PID Out Scale : Adjusts the size of the controller output.
APP-42 PID Unit Sel : Sets the unit of the control.
Setting Type Function
0 % - Displayed in percentage instead of a certain physical value.
1 Bar
2
3
mBar
Pa
Pressure Various pressure units are available.
4 kPa
5
6
Hz
Rpm
Speed Displays the inverter output frequency or motor revolution.
7 V Voltage
8
9
I
kW
Current
Electric power
Displayed in voltage, current or consumed electricity.
10 HP Horse power
11
12
o
C
o
F
Temperature In Fahrenheit or Centigrade.
APP-43 PID Unit Gain, APP-44 PID Unit Scale : Adjusts the size suited to the unit selected in APP-42 PID Unit Sel.
APP-45 PID P2-Gain : The gain of the PID controller can be changed by using the multi-function terminal. If the function
of the terminal block selected from IN-65~75 is set at No. 23 P Gain2 and then the selected terminal is input, the gain set in
APP-45 can be by passed instead of the gain set in APP-22 and APP-23.
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