# Initial Winding Diameter Calculation At A Start (tension Sensor Feedback Speed Control / Tension Sensorless Torque Control / Tension Sensor Feedback Torque Control) - Mitsubishi Electric A800 Plus Series Function Manual

8.2.11
Initial winding diameter calculation at a start
(Tension sensor feedback speed control /
tension sensorless torque control / tension
sensor feedback torque control)
Turn ON the Winding diameter measurement (X122) signal to select the initial winding measurement mode and calculate the
present winding diameter.
Initial winding diameter calculation (X122 signal)
• While tension sensorless / tension sensor feedback torque control is valid, the present winding diameter can be measured
in the initial winding measurement mode.
• Turn ON the Winding diameter measurement (X122) signal to select the initial winding measurement mode.
• To assign the X122 signal, set "122" in any of Pr.178 to Pr.189 (input terminal function selection).
• When the actual line speed reaches the Pr.1246 Line speed at winding diameter calculated value activation in the
initial winding diameter measurement mode, calculation for initial winding diameter measurement starts. When the winding
diameter difference from the last measurement remains 5 mm or less for 0.25 seconds during measurement, the Y232
signal turns ON.
• Turn OFF the X122 signal to return to the normal winding diameter calculation.
Actual line speed (m/min)
Pr.1246
Winding diameter
status
Winding diameter
calculation
Normal winding
diameter calculation
Start command
X122
Winding diameter
Y232
Winding diameter calculation completion signal (Y232 signal)
• After initial winding diameter calculation at a start is completed, the Winding diameter calculation completion at start (Y232)
signal is output.
• For the Y232 signal, set "232 (positive logic) or 332 (negative logic)" in one of Pr.190 to Pr.196 (output terminal function
selection) to assign the function to the output terminal.
Held
Initial winding measurement
ON
ON
WINDING DIAMETER COMPENSATION FUNCTION
Winding diameter calculation setting
Calculation
Calculation
Calculation
Normal winding diameter calculation
5-mm diameter change or less in 0.25 s
5-mm diameter change or less in 0.25 s
5-mm diameter change or less in 0.25 s
0.25 s
ON
Time
Held
8
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