Mitsubishi Electric FR-D720-008 Instruction Manual page 215

Parameter
Name
Number
Output interruption
577
cancel level
The above parameters can be set when Pr. 160 Extended function display selection ="0". (Refer to page 160)
∗1
Pr. 129, Pr. 130, Pr. 133 and Pr. 134 can be set during operation. These can also be set independently of the operation mode.
(1) PID control basic configuration
Pr. 128 = "20, 21" (measured value input)
Pr. 133
or terminal 2
Set point
0 to 5VDC
(0 to 10VDC)
(2) PID action overview
1)PI action
A combination of proportional control action (P) and integral control
action (I) for providing a manipulated variable in response to deviation
and changes with time.
[Operation example for stepped changes of process value]
(Note) PI action is the sum of P and I actions.
2)PD action
A combination of proportional control action (P) and differential
control action (D) for providing a manipulated variable in response to
deviation speed to improve the transient characteristic.
[Operation example for proportional changes of process value]
(Note) PD action is the sum of P and D actions.
Initial Setting
Value Range
900 to Set the level (Pr. 577 minus 1000%) at which the PID output interruption
1000%
1100% function is canceled.
Inverter circuit
+ -
Kp 1+
Terminal 4
Feedback signal (measured value)
Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Special operation and frequency control
Description
Manipulated
PID operation
variable
1
+Td S
Ti S
4 to 20mADC (0 to 5V, 0 to 10V)
Deviation
P action
I action
PI action
Measured value
P
action
D action
PD
action
Motor
IM
Set point
Measured value
Time
Time
Time
Set point
Deviation
Time
Time
Time
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