Parameter setting procedure for tension sensorless torque control
112
TENSION SENSORLESS TORQUE CONTROL
5.4
Parameter setting procedure for tension
sensorless torque control
The following procedure shows the parameter setting example for the tension sensorless torque control.
5.4.1
Parameter setting procedure
1
Wiring
Perform secure wiring.
NOTE
• Do not feed the workpiece through the machine.
2
Control method selection
Select the control method according to the application and the motor.
∗1
For the control method, vector control is recommended.
∗2
Setting is required for a motor other than a Mitsubishi Electric motor (the SF-PR, SF-JR, SF-HR, SF-JRCA, SF-HRCA, or SF-V5RU (1500 r/min
series) motor).
NOTE
• Torque control is not available for regenerative driving in a low-speed range (about 10 Hz or lower) or light-load operation in a
low-speed range (about 5 Hz or lower and about 20% or lower of the rated torque) under Real sensorless vector control.
Select Vector control for regenerative driving or light-load operation in a low-speed range.
• For the parameter details, refer to the FR-A800 Instruction Manual (Detailed).
3
Speed limit setting
Set the speed limit as required as follows.
NOTE
• Use
Pr.807 to Pr.809
and
Pr.1113
to set the speed limit. As the speed limit value is overwritten frequently, set "0" in
Pr.342
Communication EEPROM write selection
to enable RAM write. For the parameter details, refer to the FR-A800 Instruction
Manual (Detailed).
4
Torque characteristic setting
Set "1" in
Pr.803
to make the torque characteristic constant for the tension command in the low-speed range and
in the constant output range.
5
Offline auto tuning
Perform offline auto tuning as required. For offline auto tuning, refer to
After the offline auto tuning, perform the test run of the motor alone to make sure that no fault is found in the
motor's behavior.
Pr.
Name
71
Applied motor
9
Electronic thermal O/L relay
80
Motor capacity
81
Number of motor poles
83
Rated motor voltage
84
Rated motor frequency
800
803
Constant output range torque characteristic selection
807
Speed limit selection
810
Torque limit input method selection
359
Encoder rotation direction
369
Number of encoder pulses
707
Motor inertia (integer)
724
Motor inertia (exponent)
862
Encoder option selection
Pr.
Name
96
Auto tuning setting/status
× 1.1 to 1.2
π
× Present diameter × Gear ratio
Present line speed
Speed limit value =
Summary of Contents for A800 Plus Series
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