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Inverter use for PID control pressure water supply control
Sample :(User requirement )
Keypad given setting pressure. pressure transmitter(sensor) is feedback
signal .external push button start . require pressure is 0.5MPa. If the pressure is higher than 0.5MPa.the inverter decrease the speed. When the frequency reach to 30.00Hz. and the pressure is still higher than 0.5MPa.the inverter stop automatically . the inverter will start automatically when the frequency reduce to 0.4MPa.The measure range of pressure transmitter is 0.0～1.0MPa.If the inverter failure can be working frequency and running by manual. The parameters are set as bellows:
Picture 1
|
Parameter |
Parameter Description |
Settings |
Explanation |
|
F0.01 |
Running channel source selection |
1 |
External terminal control |
|
F0.03 |
Main frequency channel source selection |
5 |
PID Control |
|
F1.05 |
Stop mode |
1 |
Coast to stop |
|
F5.00 |
Input terminal X1 function selection |
1 |
Forward Running |
|
F5.01 |
Input terminal X2 function selection |
7 |
External Reset input |
|
F9.00 |
PID given source selection |
0 |
Keypad Setting |
|
F9.01 |
PID given value |
0.5MPa |
Keypad setting 0.5MPa as pressure |
|
F9.02 |
PID feedback source selection |
1 |
External current feedback |
|
F9.03 |
PID output characteristics selection |
0 |
PID output is positive |
|
F9.04 |
Proportional gain Kp |
1.00 |
No need to change |
|
F9.05 |
Integral time Ti |
0.10s |
No need to change |
|
F9.06 |
Differential time Td |
0.00s |
No need to change |
|
F9.07 |
Sampling cycle T |
0.10s |
No need to change |
|
F9.08 |
Bias limit |
0.00MPa |
No need to change |
|
F9.09 |
Feedback lost detecting value |
0.00MPa |
No need to change |
|
F9.10 |
Feedback lost detecting Time |
60.0s |
Set according to actual request |
|
F9.11 |
Feedback gain |
100% |
Set according to actual request |
|
F9.12 |
Awakening threshold width |
0.1MPa |
Set according to actual request |
|
F9.13 |
Awakening threshold detection time |
1.00s |
Set according to actual request |
|
F9.14 |
Sleep frequency |
30.0Hz |
Set according to actual request |
|
F9.15 |
Sleep frequency detection Time |
1.00s |
Set according to actual request |
|
F9.16 |
Guage range |
1.00MPa |
Set according to actual request |
When use the PID function ,In order to meet the control demands, Customers can modify the parameter according to the actual request.
The contactor KM1,KM2 are shifting from working frequency to variable frequency .Must be designed in interlocked manner ,It is forbidden to close the two contactors at the same time. Otherwise. the inverter will be permanent damaged.
