The Outline Of Pid Control - Toshiba TOSVERT VF-P7 Instruction Manual

3.3 Operation of the VF-P7 [2]
PID control function of VF-P7 enables process control such as wind regulation or flux regulation,
pressure regulation. Operation permission / prohibition

3.3.1 The outline of PID control

The outline block diagram of PID control becomes like the following figure.
Reference of
process amount
Feedback amount
Note) Jump frequency function is performed to either of the following.
①Process amount
②Output frequency (Motor speed)
Set up with parameter  for your application.
Block diagram of PID control system becomes like the following.
Reference of
process amount
Feedback amount
Over-ride
process
PID deviation
upper limit
Delay filter
＋
−
PID deviation
lower limit
Jump frequency
process #1
(Output frequency)
PID controller
＋
−
Jump frequency
process #1
(Process value)
Run frequency
process
An example of deviation
/
Acceleration/
deceleration

Output
frequency
VF-P7
C-8
/

Permission or
prohibition of
operation
Proportional gain
Integral gain
＋
Differential gain
Output
frequency
process
Process amount
Fan, pump
and so on.
＋
＋