Mitsubishi Electric FR-E720-0.1 K Instruction Manual page 246

Special operation and frequency control
Parameter
Name
Number
PID action set
133 ∗1
point
PID differential
134 ∗1
time
The above parameters can be set when Pr.160 User group read selection ="0". (Refer to page 183)
∗1
Pr. 129, Pr. 130, Pr.133 and Pr.134 can be set during operation. They can also be set independently of the operation mode.
(1) Dancer control block diagram
Main speed command
*1
PID deviation
Dancer roll
+
setting point
Pr. 133
PID set point
Convert to 0 to 100%
Terminal 4
∗1
The main speed can be selected from all operation mode such as external (analog voltage input, multi-speed), PU (digital frequency setting), communication
(RS-485, CC-Link).
Set point and measured value of PID control
Set point
When measured value is input as current
(4 to 20mA)
Measured
value
When measured value is input as voltage
(0 to ±5V or 0 to ±10V)
NOTE
Changing the terminal function using any of Pr. 178 to Pr. 184 may affect the other functions. Make setting after
confirming the function of each terminal.
When the Pr. 267 setting was changed, check the voltage/current input switch setting. Different setting may cause a
fault, failure or malfunction. (Refer to page 171 for setting)
244
Initial Value
9999
9999
Acceleration/deceleration
of main speed
PID control
1
Kp(1+ + Td S)
Ti S
-
PID feedback
Input
Pr. 133
4mA
0V
0V ......... 0%, 10V .......100%
Setting
Range
0 to 100% Used to set the set point for PID control.
9999 Always 50%
For deviation ramp input, time (Td) required for
providing only the manipulated variable for the
0.01 to 10.00s proportional (P) action.
As the differential time increases, greater response
is made to a deviation change.
9999 No differential control.
Ratio
Pr. 128 = 42, 43
Pr. 128 = 40, 41
Potentiometer
Input Signal
0 to 100%
.....
0%, 20mA...100%
.........
0%, 5V.........100%
Description
Limit
+
X14
+
Dancer roll position detection
Pr.267 Setting Current/Voltage Input Switch
—
0
1
2
Target frequency
Acceleration/
deceleration
IM
—