Parameter Description MD280/MD280N User Manual
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Group F6 Process Control PID Function Parameters
PID control is a common method used in process control. Through the
proportional, integral and differential calculation on the differences between
feedback signal of the controlled parameter and signal of the target
parameter, PID control adjusts the output frequency of the inverter and
forms negative feedback system, making the controlled parameter
stabilized on the target parameter. PID control applies several process
controls such as flow control, pressure control and temperature control.The
schematic diagram for control is as shown in Fig. 6-20.
Target Quantity
Feedback Quantity
Deviation
Limit
Target Quantity
Feedback Quantity
Deviation
Limit
Fig.6-20 Schematic Diagram for Process PID
PID reference source
Factory
default value
0
0 F6-01
1 AI1
2 AI2
3 PULSE (DI5)
F6-00
Set
up
valu
e
4 MS speed
It is used to select target parameter reference channel of process PID.
If the set target value of process PID is a relative value, 100% of the set
value corresponds to 100% of the feedback signal of controlled system.
Caution:
When F6-00 is selected to 4(MS speed), F8-00 (MS speed 0 reference
mode is not selected to 4.
PID numerical value
reference
Factory
default value
50.0%
F6-01
Setup range 0.0% to 100.0%
This parameter needs to be set when F6-00 is set as 0.
Reference value of this parameter is the feedback value from the system.
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