Mitsubishi Electric A800 Plus Series Function Manual page 181

Winding diameter calculation setting
Speed control proportional gain selection (Pr.639 to Pr.644)
• Speed control proportional gain at vector control and Real sensorless vector control can be changed based on a winding
diameter calculation result.
Speed control proportional
((Maximum diameter - Minimum diameter) × Pr.639/100) + Minimum diameter
X1 =
((Maximum diameter - Minimum diameter) × Pr.640/100) + Minimum diameter
X2 =
• This function is activated when two or more settings of Pr.641 to Pr.644 (speed control proportional gain 1 to 4) are set.
If two or more setting are not set, Pr.820 Speed control P gain 1 (Pr.830 Speed control P gain 2) is valid regardless of
the winding diameter.
• A machine operates at 33% when Pr.639 = "9999", at 66% when Pr.640 = "9999".
• The following graph shows the value of speed control proportional gain when two settings are made.
Speed control proportional
(Proportional gain 4)
(Proportional gain 3)
NOTE
• When Pr.639 = Pr.640, larger gain between proportional gain 2 and proportional gain 3 becomes valid.
Speed control proportional gain disabled signal (X124 signal)
• Use the Speed control proportional gain disabled (X124) signal to disable the Pr.641 to Pr.644 settings.
• To assign the X124 signal, set "124" in any of Pr.178 to Pr.189 (input terminal function selection).
Winding diameter
calculation
Disabled
Enabled
180
WINDING DIAMETER COMPENSATION FUNCTION
(P) gain (%)
Pr.644
(Proportional gain 4)
Pr.643
(Proportional gain 3)
Pr.642
(Proportional gain 2)
Pr.641
(Proportional gain 1)
.
Pr 1236
. .
(Pr 1238, Pr 1240, Pr
Minimum diameter
(P) gain (%)
Pr.644
Pr.643
Pr.1236
(Pr.1238/Pr.1240/Pr.1242)
Minimum diameter
Small
X124
OFF Pr.820/Pr.830
ON Pr.820/Pr.830
OFF Pr.641 to Pr.644
ON Pr.820/Pr.830
X1 X2
.
1242) (Pr
Small Medium
X1 X2
Medium
Speed control gain
Winding diameter (mm)
.
Pr 1235
. . .
1237, Pr 1239, Pr 1241)
Maximum diameter
Large
Winding diameter (mm)
Pr.1235
(Pr.1237/Pr.1239/Pr.1241)
Maximum diameter
Large