Mitsubishi Electric FR-A800 Series Instruction Manual page 624

Pr.
610 PID measured value
A625 input selection
1134 PID upper limit
A605 manipulated value
1135 PID lower limit
A606 manipulated value
 Block diagram of dancer control
Main speed command
*1 The main speed can be selected in all operation modes, External (analog voltage input, multi-speed), PU (digital frequency setting) and
Communication (RS-485).
 Outline of dancer control
• Dancer control is performed by setting "40 to 43" in Pr.128 PID action selection. The main speed command is the speed
command for each operation mode (External, PU, and communication). PID control is performed by the dancer roll position
detection signal, and the control result is added to the main speed command. For the main speed acceleration/deceleration
time, set the acceleration time to Pr.44 Second acceleration/deceleration time and the deceleration time to Pr.45
Second deceleration time.
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Name Initial value Setting range
1
2
3 3
4
5
100% 0 to 100%
100% 0 to 100%
*1
PID deviation
PID control
Dancer roll
+
setting point Kp(1+
-
Pr.133
PID feedback
PID set point
Convert to 0 to 100%
Terminal 4
Output frequency PID adding value
Main speed
STF
search engine
The measured value is input through terminal 1.
The measured value is input through terminal 2.
The measured value is input through terminal 4.
The measured value is input via communication.
The measured value is input by the PLC function.
Set the upper limit of PID action.
Set the lower limit of PID action.
Acceleration/deceleration
of main speed
Ratio
Pr.128 = 42, 43
1
+Td S)
Ti S
Pr.128 = 40, 41
Potentiometer
ON
Description
Target frequency
Acceleration/
Limit deceleration
+
X14
+
M
Dancer roll position detection
Output frequency
Time
5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
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