HP Anab EQ5 - Manual (Page 83)

TECO –Westinghouse Motor Company Function Explanation 77
PID control detects the amount of control (feedback
amount) from a sensor of the control target, then
compares it with the target value (e.g., reference
temperature). If the values differ, this function performs a
control to eliminate the deviation. In other words, this
control matches the feedback amount with the target
value.
This function can be used for flow control, pressure control,
temperature control, and other process controls.
Target
value
P
Drive
section
Control
target
I
D
+
+ +
+
-
Feedback amount
Forward or reverse operations can be selected for PID
controller output. This enables motor revolutions to be
faster or lower according to PID controller output
This function cannot be used when the motor 2 is
selected.
H 2 0 P I D M O D E
Set value 0: No operation
1: Forward operation
2: Reverse operation
For
wa
rd
op
erati
on
Rev
er
se
op
erati
on
Maximum
frequency
0
0% 100% PID output
Inverter output
frequency
The target value can be entered using F01, "Frequency
setting 1," or directly from the keypad panel. Select any
terminal of Terminals X1 (E01) to X9 (E09) and set value
11 (frequency setting switching).
For entry from F01, "Frequency setting 1," input an OFF
signal to the selected terminal. For direct entry from the
keypad panel, turn on the selected terminal.
For the target value and feedback amount, the process
amount can be displayed according to the values set in
E40, "Display coefficient A," and E41, "Display
coefficient B."
This function selects the feedback amount input terminal
and electrical specifications of the terminal. Select a value
from the table below according to sensor specifications.
Set value Descriptions
0 Control terminal 12, forward operation (0 to
10V voltage input)
1 Control terminal C1, forward operation (4 to
20mA current input)
2 Control terminal 12, reverse operation (10
to 0V voltage input)
3 Control terminal C1, reverse operation (20
to 4mA current input)
For
wa
rd
op
er
at
ion
Rev
er
se
op
erati
on
100%
0%
0V
4mA
10V
20mA
Input
Feedback amount
Only positive values can be input for this feedback amount
of PID control. Negative values (e.g., 0 to -10V, -10 to 0V)
cannot be input, thereby the function cannot be used for a
reverse operation by an analog signal.
H 2 1 F B S I G N A L
Target value or
feedback amount
Display
Display coefficient A
Display coefficient B
0% 100%
H21 PID control (Feedback signal)
H25 PID control (Feedback filter)
H20 PID control (Mode select)
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