MX2 Quick Start Guide 31
PROGRAMMING MX2
100% torque is referred to inverter rated current, absolute torque value is up the motor to be combined.
3.17 Torque control
Torque control in open loop could be achieve with following parameters. 100% torque is referred to inverter rated current but
absolute torque value depends on the motor connected. It has limited accuracy and working range so is recomended only above
15 - 20Hz and over 20 - 30% of the motor torque capacity.
To enable the torque control is necessary to assign the “ATR” (Enable torque command input) to one of the multi-function inputs
and set it to ON. When the input is OFF the inverter will work in speed mode.
At low speed, small torque command or 4 quadrant control applications the perfomance of this function will be limited due the
open loop system.
3.18 Electronic thermal overload
The thermal overload detection protects the inverter and motor from overheating due to an excessive load using a current
inverse time curve to determine the trip point. The characteristic curve depends on dual rate setting in b049 and is unique for
both inverter and motor but reduction rate depending on the frequency could be selected in parameter b013.
b022 Torque limit 2 (rev/regen.) Torque limit level in reverse regen. quadrant, range is 0 to 200% / no(disabled)
b043 Torque limit 3 (rev/power) Torque limit level in reverse powering quadrant, range is 0 to 200% / no(disabled)
b044 Torque limit 4 (fwd/regen.) Torque limit level in forward regen. quadrant, range is 0 to 200% / no(disabled)
b045 Torque LAD STOP selection 00 Disable
01 Enable
Parameter Parameter name Description
P033 Torque command input selection 00… Analog voltage input [O]
01… Analog current input [OI]
03… Operator, 06…Option
P034 Torque command level input Set range is 0~200%
P036 Torque bias mode selection 00… According to the sign
01… According to the rotation direction
05… Option
P037 Torque bias value setting Range is -200~200%
P038 Torque bias polar selection 00… No bias
01… Operator
P039 Speed limit of Torque control (Forward
rotation)
Set range is 0.00~120.00Hz
P040 Speed limit of Torque control (Reverse
rotation)
Set range is 0.00~120.00Hz
P041 Speed / Torque control switching time Set range is 0 to 1000 ms
Parameter Parameter name Description
Trip time (s)
Percentage of
b012/b212
60
3.0
0
200%150%109%
b049=00 (HD )
Trip time (s)
Percentage of
b012/b212
60
0.5
0
150%120%116%
b049=01 (ND )
I129E-EN-02+MX2+QuickStartGuide.book Seite 31 Mittwoch, 7. November 2012 1:54 13
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