System Configuration Example; Control Block Diagram - Mitsubishi Electric A800 Plus Series Function Manual

System configuration example

3.2
System configuration example
M
FR-A800-R2R
FR-A8AP
Line speed
command
2
Dancer/tension
control selection
X114
Start signal
STF/STR
AM
3.3

Control block diagram

PID action
set point
(Pr.133)
Dancer signal /
Dancer
tension feedback
roll position
input selection
Pr.363
Actual line speed
Actual
input selection
line speed
Pr.362
Line speed
Line speed
command selection
command
Pr.361
42
DANCER FEEDBACK SPEED CONTROL
Potentiometer
Dancer roll
Encoder
Line speed command
X116-OFF
PID operation
+
Pr.129, Pr.130,
Pr.134
-
0
X116-ON
X115-OFF
Winding diameter
calculation
Pr.1235, Pr.1236,
Pr.1243, Pr.1244
Held
X115-ON
Line speed command
Acceleration
/deceleration
Pr.394, Pr.395
line speed to frequency
∗1 Winding diameter compensation speed =
∗2 After clearing, the value becomes the minimum winding diameter when Pr.1230 = "0" (winding),
and the maximum winding diameter when Pr.1230 = "1" (unwinding).
Maximum diameter
Dancer/tension control selection
Stored winding diameter clear
Winding length clear
Dancer signal
Line speed command
Pr.363 = 9999
0
Pr.363 = 9999 +
Pr.128 = 40, 41
+
X109-OFF
Winding diameter
Winding
diameter
∗2
clear
X109-ON
Winding diameter
Winding diameter
compensation
compensation
speed∗1
speed generation
Conversion from
Frequency
command
π × Winding diameter × Gear ratio
M
FR-A800-R2R
FR-A8AP
X114 (Pr.180 = 114)
X109 (Pr.181 = 109)
X117 (Pr.182 = 117)
Start signal
STF/STR
1 (Pr.363 = 5)
2 (Pr.361 = 3)
For winding roll (Pr.1230 = 0)
Speed control proportional
gain compensation
Pr.639 to Pr.644
X114-ON
Pr.128 = 0
X114-OFF Motor speed
Line speed command
Minimum
diameter
Encoder
Speed
M
control
Acceleration
Encoder
/deceleration
Pr.7, Pr.8 = 0