Instruction manual

41
Torque control operation
CONTROL
4
z16bit two’s complement
4.2.5 Torque command setting
z Torque command selection
The figure below shows how to give the torque command in the constant power range (extended function
parameter).
Torque
command
-327.68% -100% -50% -25% 0% 25% 50% 100% 327.67%
-32768 -10000 -5000 -2500 0000 2500 5000 10000 32767
Hexadecimal 8000H D8F0H EC78H F63CH 0 09C4H 1388H 2710H 7FFFH
Decimal 32768 55536 60536 63036 0 2500 5000 10000 32767
CAUTION
• The internal resolution of the torque command is 0.024% (100/2
12
) and the fraction less than the resolution is rounded off.
• The range of torque setting is from -327.68% to 327.67%. (-400% to 400% when shipped from the factory)
• A negative value can not be input from the control panel DU04-01 and parameter unit PU04V, a value can not be set in 0.01%
increments. The setting range is from 600 to 1400% and setting increments is 1% increments. When the value set from the
CC-Link is read from the PU04V or DU04-01, the value is also converted to 600 to 1400 for display.
Parameter Name
Factory
Setting
Setting
Range
803
Constant power
range torque
characteristic
selection
00, 1
Pr. 803 = 1: Constant torque
Pr. 803 = 0: Constant output
Base speed
Speed
Torque command
(1) Calibration of torque command terminal 3
Refer to the chart on the right for the relationship
between torque setting input voltage and output
voltage. The torque setting input signal is in
proportion to the output torque. Note that the
motor-developed torque varies with the motor
temperature.
Use Pr. 904 and Pr. 905 to adjust bias/gain of
the terminal 3. (Refer to page 51.)
-150%
10V Terminal 3
Gain
Pr. 905
Bias
Pr. 904
150%
Output torque
(Torque command)
-10V
0