PID function
This integrated process control function can be used for controls such as constant flow and control for fan and
pump applications. When using this function set A071 to 01. Turn off the terminal in the case that you validate
this function or turn on the terminal in the case that you invalidate this function
after assigned 23 (PID valid/invalid) to intelligent input terminal in the
case of switching valid / invalid of this function with the outside signal
Set item
PID selection
PID P gain
PID I gain
PID D gain
PID scale
PID feedback
selection
Maximum PID
Deviation level
Function code
Data
Contents
A071
A072
A073
A074
A075
A076
C044
00
00
01
01
0.2-5.0
0.0-3600.
0.00-100.0
0.00-100.0
0.01-99.99
Invalid
Valid
Proportional gain
Integration Gain
Unit : seconds
Derivative gain
Unit : seconds
Unit : Times
O1-L : 4-20mA
O-L : 0-10V
Unit : %
Set value +
-
Deviation
0 10V
4 20mA
K p(
1
+
Tis
+ Tds)
Manipulated
variable Inverter
Normal control
M
sensor
Feedback
Kp : proportional gain Ti : Reset time Td : Rate time
0 10V
4 20mA
A074
A074
A072
Larger
Larger
Larger
Larger
Larger
Larger
Smaller
Smaller
Smaller
Smaller
Smaller
Smaller
A072
Set value
Manipulate
d variable
Change into step function
Change into lamp function
A073
A073
1
fs
=
Transducer
S:Operator
:Deviation
(1) Feedback selection
Select which analogue input terminals will be the feedback reference (A076).
Set the set frequency command selection with A001. (In should not be the same as the terminals selected
with A076). Or when the control terminal 01 is set with A001, the setting of AT selection A005 is invalid.
The contents changes when 02 is selected with A006.
(2) Basic operation of PID control
(3) Components of PID
[1] P action This is the action that the manipulated variable is in proportion to the command.
[2] I action This the action that the manipulated variable increases with time in a straight lime.
[3] D action This is the action that the manipulated variable in proportion to the changing rate of command.
PI action combines above [1] and [2], PD action does [1] and [3], PID action does [1], [2] and [3].
Set value
Manipulate
d variable
Set value
Manipulate
d variable
Relation code
A001 : Frequency command
selection
A005 : AT selection
A071 : PID selection
A072 : PID P gain
A073 : PID I gain
A074 : PID D gain
A075 : PID scale
A076 : PID feedback selection
d004 : PID feedback monitor
C001-C008 : Intelligent input
terminal
C021-C025 : Intelligent output
terminal
C004 : PID deviation setting level
Chapter 4 Explanation of function
N300-P INSTRUCTION MANUAL
Summary of Contents for N300-P
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