INVT Goodrive300-21 Series Operation Manual page 61

Goodrive300-21 integrated machine for air compressor
(2) The pressure and running frequency control of air compressor during running is shown as below:
Current
pressure
P18.05
P18.07
P18.06
0
A B
Current running
frequency
P00.04
P18.11
P18.12
P01.15
0
A B
In above figure, P18.05 is unloading pressure, P18.06 is loading pressure and P18.07 is the set
pressure.
P00.04 is upper limit frequency, P18.11 is lower limit value of loading running frequency, P18.12 is
no-load frequency and P01.15 is stop speed. In the figure, the process instruction for A–H stages are
listed as below:
A: Stand-by state
B: Beginning stage of starting, the duration time is P18.15 (including part of ACC time P00.11)
C: Constant pressure exhaust stage of loading, pressure PID adjustment is valid
D: Unloading stage, the duration time includes part of DEC time P00.12 and P18.13
E: Sleep stage, the inverter does not run
F: Wake-up and starting stage, the duration time is P18.15 (including part of ACC time P00.11)
G: Beginning of stop, the duration time includes part of DEC time P00.12 and P18.14
H: Restart delay stage after stop, the duration time is P18.16
When air compressor control is valid, its air supply will be normal after it starts in automatic
loading/unloading mode. When the exhaust pressure is detected to be above P18.05, automatic
unloading will be applied. If sleep function is valid, the inverter will enter sleep state. While if sleep
function is invalid, the inverter will run continuously at no-load frequency P18.12. When the exhaust
C D E
C D E
-
58
F C
F C
-
Function instruction
Time
G H A
Time
G H A