Mitsubishi Electric FR-D720-0.1K Instruction Manual page 222

Special operation and frequency control
(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), and
communication (RS-485).
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.182 may affect the other functions. Set parameters 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 151 for setting)
220
Acceleration/deceleration
of main speed
PID control
1
+ Td S)
Kp(1+
Ti S
-
PID feedback
Input
Pr. 133
4mA
0V
0V ......... 0%, 10V ....... 100%
Ratio
Pr. 128 = 42, 43
Pr. 128 = 40, 41
Potentiometer
Input Signal
0 to 100%
.....
0%, 20mA...100%
.........
0%, 5V......... 100%
Target frequency
Limit
+
X14
+
Dancer roll position detection
Pr.267 Setting Voltage/Current Input Switch
—
0
1
2
Acceleration/
deceleration
IM
—