Mitsubishi Electric 800 Series Instruction Manual page 510

Pr. Name
609 PID set point/deviation
A624 input selection
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
Dancer roll
+
setting point
Pr.133
PID set point
Convert to 0 to 100%
Terminal 4

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.
Output frequency
Initial Setting
value range
1
2
2 3
4
5
1
2
3 3
4
5
100% 0 to 100%
100% 0 to 100%
Acceleration/deceleration
of main speed
PID deviation
PID control
1
Kp(1+ +Td S)
Ti S
-
PID feedback
PID adding value
Main speed
STF
Input set point from terminal 1
Input set point from terminal 2
Input set point from terminal 4
Input set point via communication
Input set point by PLC function
Input measured value from terminal 1
Input measured value from terminal 2
Input measured value from terminal 4
Input measured value via communication
Input measured value by PLC function
Set the upper limit of PID action.
Set the lower limit of PID action.
Ratio
Pr.128 = 42, 43
X14
Pr.128 = 40, 41
Potentiometer
Dancer roll position detection
ON
(A) Application parameters
Description
Target frequency
Acceleration/
Limit deceleration
+
+
M
Output frequency
Time
PARAMETERS
5
GROUP
A
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