User Manual of EM730/EM730E Series Inverter
249
For general communication (F10.05=0):
a
、
F13.08=6: the upper frequency limit is “700BH (communication percentage setting of
the upper frequency limit of torque control) * F13.09 (upper frequency limit of torque
control)”;
b
、
F13.08=7: the upper frequency limit is “7018H (communication setting of the upper
frequency limit of torque control)”.
The 700BH data range is 0.00% to 200.00%, and the 7018H data range is 0.00 to F00.16
(maximum frequency), as detailed in Table 12-31.
The upper frequency limit of torque control is used to set the maximum forward or
reverse running frequency of the inverter in the torque control mode.
In the torque control mode, if the load torque is less than the output torque of the
motor, the motor speed will rise continuously, and the maximum speed of the motor must
be limited during torque control to prevent the mechanical system from galloping and other
accidents; if the load exceeds the output torque of the motor and even the motor is drive to
run reversely, the maximum operating load frequency of the motor is still restricted in the
case of F13.19=1 and not restricted in the case of F13.19=0.
The upper frequency limit of reverse running is dependent on F13.09 * F13.18.
Example: The torque is set to be positive and the upper frequency limit of torque control is
the AI1 analog input. When the AI1 analog input is positive, the upper frequency limit
corresponding to the forward speed limit is AI1 (percentage) * F13.09 and that corresponding to
the reverse speed limit is AI1 (percentage) * F13.09 * F13.18; and when the AI1 analog input is
negative, the upper frequency limit corresponding to the forward speed limit is AI1 (percentage)
* F13.09 * F13.18 and that corresponding to the reverse speed limit is AI1 (percentage) *
F13.09.
Maximum operating frequency in torque control = upper frequency limit of torque control
+ offset of upper frequency limit (valid only when F13.08=1 to 5), but the maximum operating
frequency is limited by the maximum frequency of F00.16.
Function
code
Function code name
Parameter
description
Unit
Default
setting
Attribute
F13.11
Static friction torque
0.0-100.0
%
0.0
●
