Mitsubishi Electric A800 Plus Series, Function Manual

Page: 122 / 242

Tension sensorless torque control details
TENSION SENSORLESS TORQUE CONTROL
121
5
 The setting range and setting increment of the tension command
(Pr.1401)
• The setting increment of the tension command can be changed by the Pr.1401 Tension command increment setting. The
setting range is also changed according to the increment.
NOTE
• Changing the Pr.1401 setting changes the tension command setting (Pr.365 , Pr.366 , Pr.1283 , Pr.1403 , and Pr.1405) . Before
changing the Pr.1401 setting, confirm that changing the tension command setting will not cause any problem.
 Tension command - torque command switchover (X125 signal)
• When the X125 signal is turned ON during torque control, the commanded tension can be written via communication (CC-
Link/CC-Link IE/PROFIBUS-DP) regardless of whether the tension sensorless torque control is valid or invalid.
• Turn ON the X125 signal to input the tension command value before activating the tension sensorless torque control, or to
disable the tension sensorless torque control without accidentally changing the torque command value.

: Available through communication, × : Not available through communication
∗1
Set Pr.362
≠
"0" for the actual line speed input selection while tension sensorless torque control is valid. By setting Pr.362 = "0" (the line speed
command value is set as the actual line speed), the line speed command value is used as the actual line speed. However, the line speed
command setting is not used as it is. The actual line speed command output value in consideration of acceleration/deceleration is applied.
∗2
Set Pr.807
≠
"0" (the frequency command value is set as the speed limit) for setting the speed limit while tension sensorless torque control is
valid. While tension sensorless torque control is valid, the tension command value and the frequency command value cannot be set
simultaneously.
5.5.3
Torque generation direction setting
Set parameters according to the requirement because the torque direction for winding/unwinding differs for each device. Set
the torque generation direction in accordance with the machine used.
• The direction of torque generation during tension sensorless torque control is determined by a combination of the settings
of the start command, Pr.1072 Tension reverse selection , and Pr.1114 Torque command reverse selection .
Pr.1401 setting Setting increments Setting range
0 (initial value) 0.01 N 0 to 100 N
1 0.1 N 0 to 1000 N
2 1 N 0 to 10000 N
Tension
sensorless
torque control
X125 signal
Command value setting availability through communication
Tension command
value
Torque command
value
Line speed
command value
∗1
Frequency
command value
∗2
Valid
ON  ×  ×
OFF ×  × 
Not assigned  ×  ×
Invalid
ON  ×  ×
OFF ×  × 
Not assigned ×  × 
Pr. Name Initial value
Setting
range
Description
1072
R304
Tension reverse selection
0
0 The tension direction is not reversed.
1 The tension direction is reversed.
1114
R305
(D403)
Torque command reverse
selection
0
0 The torque direction is not reversed.
1 The torque direction is reversed.
Pr.1114 Pr.1072
Torque generation direction
STF signal ON STR signal ON
0 (The torque direction is not
reversed at STR-ON.)
0 (Not reversed) Forward rotation direction Forward rotation direction
1 (Reversed) Reverse rotation direction Reverse rotation direction
1 (The torque direction is
reversed at STR-ON.)
0 (Not reversed) Forward rotation direction Reverse rotation direction
1 (Reversed) Reverse rotation direction Forward rotation direction