Mitsubishi Electric A800 Plus Series Function Manual page 163

Winding diameter calculation setting
Winding diameter calculation function (Pr.1247, Pr.1248, X115 signal)
• Dancer feedback speed control, tension sensor feedback speed control, tension sensorless torque control, or tension
sensor feedback torque control is performed.
- Dancer feedback speed control or tension sensorless torque control is valid.
- Pr.1247 Winding diameter change increment amount limit ≠ "9999"
- The X115 signal is OFF or not assigned.
• Set Pr.1247 to limit the amount of change in the winding diameter calculation (per winding diameter calculation cycle) to
avoid sudden changes of the winding diameter calculation result from the last time. Use Pr.1247 to set the maximum
amount of change in each winding diameter calculation.
• Use Pr.1248 Winding diameter change limit disable time to set the waiting time to start limiting the change increment
amount after the winding diameter calculation is started.
Winding diameter
• The present value of winding diameter is retained while the X115 signal is ON. (The winding diameter calculation is
stopped, and the winding diameter value is not updated.)
• To assign the X115 signal, set "115" in any of Pr.178 to Pr.189 (input terminal function selection).
NOTE
• The change increment amount limit is invalid in the initial winding measurement mode (while the X122 signal is ON). (The
change amount is not limited.)
• While Pr.1247 = "9999" or the winding diameter calculation is disabled by the X115 signal, the present winding diameter
value is retained.
Gear ratio setting (Pr.1243, Pr.1244)
• Set a number to determine the gear ratio in Pr.1243 Gear ratio numerator (follower side) and Pr.1244 Gear ratio
denominator (driver side) when a reduction gear is installed between the driving shaft and the motor shaft.
Follower side (Pr.1243)
• Gear ratio calculation
Gear ratio Z =
NOTE
• Set the gear ratio accurately.
162
WINDING DIAMETER COMPENSATION FUNCTION
For one-time calculation
Pr.1248
Winding diameter held Winding diameter calculation
Pr.1243
Pr.1244
Pr.1247
Winding diameter held
Driver side (Pr.1244)