Mitsubishi Electric A800 Plus Series Function Manual page 56

7
Calculation of the medium diameter gain
With medium-diameter roll
Tuning with the medium-diameter roll 1
Perform easy gain tuning in the same way used for the tuning
1
with the minimum-diameter roll.
Then, set the Pr.820 value in Pr.642.
Tuning with the medium-diameter roll 2
Perform easy gain tuning in the same way used for the tuning
2
with the minimum-diameter roll.
Then, set the Pr.820 value in Pr.643.
Set the diameters of the medium-diameter rolls.
Medium-diameter roll 1
Pr.639 Speed control proportional term applied diameter 1
= (Medium diameter 1 - Minimum diameter)/(Maximum diameter -
3
Medium-diameter roll 2
Pr.640 Speed control proportional term applied diameter 2
= (Medium diameter 2 - Minimum diameter)/(Maximum diameter -
Speed control proportional
(Proportional gain 4)
(Proportional gain 3)
(Proportional gain 2)
(Proportional gain 1)
((Maximum winding diameter - Minimum winding diameter) × Pr.639/100) + Minimum winding diameter
X1 =
X2 = ((Maximum winding diameter - Minimum winding diameter) × Pr.640/100) + Minimum winding diameter
8
Tuning completion
Set Pr.819 back to "0" to complete the easy gain tuning.
9
Speed control integral time setting
Set "0" in Pr.821 Speed control integral time 1.
Parameter setting procedure for dancer feedback speed control
Minimum diameter) × 100 (%)
Minimum diameter) × 100 (%)
(P) gain (%)
Pr.644
Pr.643
Pr.642
Pr.641
.
Pr 1236
X1
. . .
(Pr 1238, Pr 1240, Pr 1242)
Minimum diameter
Small
No medium-diameter roll
Set the result of the following calculation in Pr.642 Speed control
proportional gain 2.
Pr.644 − Pr.641
Pr.642 =
Set the result of the following calculation in Pr.643 Speed control
proportional gain 3.
Pr.644 − Pr.641
Pr.643 = 8
Set "9999" (initial value) in Pr.639 and Pr.640.
.
Pr 1235
X2
. .
(Pr 1237, Pr 1239, Pr
Maximum diameter
Medium Large
DANCER FEEDBACK SPEED CONTROL
+ Pr.641
5
+ Pr.641
15
Winding diameter (mm)
.
1241)
3
55