INVT GD300-01A, Operation Manual

Page: 87 / 187

Goodrive300-01A series VFD for air compressor Function description
-81-
Function
code
Name Description Default Modify
P18.25
Convergence
coefficient (K)
It determines the converging speed of
temperature PID regulator, the larger the
value of K, the stronger the converging
intensity, however, if it is too large,
temperature oscillation may occur, users can
fine-tune based on the default value.
Setting range: 0.00
–1.00
0.12
○
P18.26
Upper limit of
temperature PID
It is used to limit the output value of
temperature PID, of which 100%
corresponds to max. output frequency
( P00.03 ) of fan.
Setting range: 0.00
–100.00%
100.00%
○
P18.27
Lower limit of
temperature PID
10.00%
○
P18.28
PT1 calibration
voltage 1 (20
℃
)
It is used to calibrate temperature detection
circuit before shipment.
Connect to the resistor whose resistance is
the same with that of PT100 at 20°C, read
the voltage value of P17.20 and input it to
P18.28 .
Connect to the resistor whose resistance is
the same with that of PT100 at 120°C, read
the voltage value of P17.20 and input it to
P18.29 .
Setting range: 0.00
–10.00V
Note: This value will stay in currently set
value when restoring to default values.
3.41V
○
P18.29
PT1 calibration
voltage 2 (120
℃
)
7.42V
○
P18.30
Pressure drop
value of upper
limit frequency
0.00
–
P18.04
When current pressure is larger than this
pressure value, decrease the upper limit
frequency as per the set value of P18.31 .
0.70Mpa
○
P18.31
Drop rate of upper
limit frequency
0.00Hz
–10.00Hz
When current pressure is larger than the
pressure drop value of upper limit frequency,
this value is the reduction quantity of the
corresponding upper limit frequency at every
additional 0.01Mpa.
0.00Hz
○