P106
:
PID control mode
The inverter can be used to control processes such as flow, air volume or pressure.
[PID operation mode select]
When the automatic tuning through PID control is started, the inverter may
automatically drive the motor in the range of upper/lower frequency clamp.
Keep out of the machine.
Failure to do so could lead to injury.
・
"Derivative look-ahead PID control" and "Proportional-derivative look-ahead PID control" can
be selected.
Derivative look-ahead PID control : In general, when changing the setting value (SP), output
change will increase and convergence will speed up.
Proportional-derivative look-ahead PID control: In general, when changing the setting value
(SP), output change will decrease and convergence will slow down.
・
Upward-downward direction of the output when the process changes (positive/negative operation)
can be selected.
Negative operation: When measured value (PV) decreases, the output is increased. (Example: hot air)
Positive operation: When measured value (PV) increases, the output is increased. (Example: cooling air)
[Automatic tuning function]
・
Applying automatic tuning, calculate the optimum value of proportional gain (Kp), integral time
(Ti) and derivative time (Td) required by PID control, and set the speculated results to parameters
automatically.
Setting data "A0"~"A3" can be used to apply changeover setting for automatic tuning function.
Refer to operating procedure of automatic tuning on page 131.
"PID operation mode select" and "changeover setting for automatic tuning function" can be applied.
・
When applying automatic tuning, ensure allowable range of the motor and machine before
application.
A3
A2
A1
A0
3
2
1
0
Data setting
value
Proportional-
derivative
look-ahead type
Derivative
look-ahead type
Proportional-
derivative
look-ahead type
Derivative
look-ahead type
PID operation mode
Negative operation
Positive operation
Provided
Negative operation
Positive operation
Positive operation
Negative operation
Positive operation
Unprovided
Negative operation
Automatic tuning function
Note
114
Caution
!
P107
~
P111
相关
参数
Related
parameters