Mitsubishi Electric A800 Plus Series Function Manual page 131

Tension sensorless torque control details
5.5.5
Inertia compensation function
The acceleration/deceleration torque is given to the motor by increasing/decreasing the torque command value to keep the
material tension constant even during acceleration/deceleration.
Pr. Name
271 Second acceleration time for
R537 inertia compensation
272 Second deceleration time for
R538 inertia compensation
753
Empty reel inertia (integer)
R539
754
Empty reel inertia (exponent)
R540
1410
Motor inertia
R530
1411
Empty reel inertia
R531
1412
Roll width
R532
1413
Material specific gravity
R533
1414 First acceleration time for
R535 inertia compensation
1415 First deceleration time for
R536 inertia compensation
1418 Inertia compensation
R534 cushion time
Block diagram
X113-OFF
Pr.1414
Pr.271
X113-ON
{Pr.393 / (π × present winding diameter) / gear ratio} /
Inertia
Pr.1410, Pr.707,
Pr.724, Pr.744,
{Pr.393 / (π × present winding diameter) / gear ratio} /
Pr.745, Pr.1411,
Pr.753, Pr.754
X113-OFF
Pr.1415
Pr.272
X113-ON
130
TENSION SENSORLESS TORQUE CONTROL
Initial
value
15 s
15 s
9999
9999
2
0 kg·m
2
0 kg·m
0 mm
3
0 g/cm
15 s
15 s
0 s
X111-ON
(9.55 × acceleration time)
(9.55 × deceleration time)
X111-OFF
Setting range
Set the acceleration time for inertia compensation when
0 to 3600 s
the X113 signal is turned ON.
Set the deceleration time for inertia compensation when
0 to 3600 s
the X113 signal is turned ON.
Set the significand of the floating-point arithmetic to
10 to 999
determine the empty reel inertia.
9999 No function
Set the exponent of the floating-point arithmetic to
0 to 7, 101 to 104
determine the empty reel inertia.
9999 No function
2
Set the motor inertia.
0 to 500 kg·m
The Pr.707 and Pr.724 settings are used to determine a
motor inertia for the first motor and the Pr.744 and
Pr.745 settings for the second motor (refer to
9999
When "9999" is set in either Pr.707 or Pr.724, or either
Pr.744 or Pr.745, an internal value is used for the first
or second motor inertia.
2
Set the empty reel inertia value.
0 to 500 kg·m
The Pr.753 and Pr.754 settings are used to determine
the empty reel inertia.
9999
When "9999" is set in Pr.753 or Pr.754, the inertia is set
to 0.
0 to 5000 mm Set the roll width.
3
Set the specific gravity of the material.
0 to 20 g/cm
Set the acceleration time during inertia compensation
0 to 3600 s
operation.
Set the deceleration time during inertia compensation
0 to 3600 s
operation.
Set the time for increasing/decreasing the torque for
0 to 360 s
inertia compensation.
Torque limit
X112-OFF
Pr.22
X112-ON
Description
page
Cushioning
Inertia compensation torque
Pr.1418
50).