Stall Mode Function - Mitsubishi Electric A800 Plus Series Function Manual

5.5.7

Stall mode function

By turning ON the Stall mode trigger (X123) signal before starting winding, tension is applied to the material and the stall
mode is activated.
This function is useful for sagging prevention of the material before it is winded.
Pr. Name
270 Acceleration/deceleration time
R342 during stall condition
1406 Commanded tension reduction
R340 scaling factor during stall condition
1407
Speed limit during stall condition
R341
1409 Tension command cushion time
R343 during stall condition
Stall mode
• While the Stall mode trigger (X123) signal is ON, the tension command value is reduced according to the Pr.1406
Commanded tension reduction scaling factor during stall condition setting. The speed limit value is switched to the
Pr.1407 Speed limit during stall condition setting.
X123
STF
X111
Tension command
Speed limit
Symbol in the
diagram
a Speed limit during stall condition
When the X111 or X112 signal turns ON while the X123 signal is ON, the tension command value is switched back to
b
the normal setting.
When Pr.1409 ≠ 0 (or Pr.1409 = "9999" and Pr.1282 ≠ 0), the cushion time is applied.
c
When the X111 or X112 signal turns ON while the X123 signal is ON, the speed limit value is switched back to the
d
normal setting.
When the X123 signal is turned ON during operation, the commanded tension is switched to the tension command
e
value multiplied by the Pr.1406 setting.
When the X123 signal is turned ON during operation, the speed limit value is switched to the value set in Pr.1407 in the
f
time set in Pr.270.
NOTE
• The commanded tension after the reduction according to the Pr.1406 setting is limited by the maximum tension command
value.
• While the inertia compensation function is activated (the X111/X112 signal is ON), the stall mode is cancelled. (The tension
command and speed limit values are switched back to the normal settings.)
Initial
value
15 s
20%
1 Hz
9999
b
Tension command × Pr.1406
a
Pr.1407
Pr.1407/Pr.20 Pr.270
Stall mode
TENSION SENSORLESS TORQUE CONTROL
Tension sensorless torque control details
Setting
range
Set the acceleration/deceleration time during stall
0 to 3600 s
mode.
Set the value to reduce the commanded tension during
stall mode.
0 to 200%
Commanded tension during stall mode = Tension
command value × Pr.1406
0 to 60 Hz Set the speed limit to be used during stall mode.
0 to 360 s Set the cushion time during stall mode.
e
c
d
Normal operation
Description
Description
f
Pr.1407
Stall mode
137
5