Torque Control; Electronic Thermal Overload - Omron 3G3MX2 Quick Start Manual

PROGRAMMING MX2
Parameter
b022 Torque limit 2 (rev/regen.)
b043 Torque limit 3 (rev/power)
b044 Torque limit 4 (fwd/regen.)
b045 Torque LAD STOP selection
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.
Parameter
P033 Torque command input selection
P034 Torque command level input
P036 Torque bias mode selection
P037 Torque bias value setting
P038 Torque bias polar selection
P039 Speed limit of Torque control (Forward
rotation)
P040 Speed limit of Torque control (Reverse
rotation)
P041 Speed / Torque control switching time
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.
b049=00
Trip time (s)
60
3.0
0
MX2 Quick Start Guide
Parameter name
Torque limit level in reverse regen. quadrant, range is 0 to 200% / no(disabled)
Torque limit level in reverse powering quadrant, range is 0 to 200% / no(disabled)
Torque limit level in forward regen. quadrant, range is 0 to 200% / no(disabled)
00 Disable
01 Enable
Parameter name
00... Analog voltage input [O]
01... Analog current input [OI]
03... Operator, 06...Option
Set range is 0~200%
00... According to the sign
01... According to the rotation direction
05... Option
Range is -200~200%
00... No bias
01... Operator
Set range is 0.00~120.00Hz
Set range is 0.00~120.00Hz
Set range is 0 to 1000 ms
(HD )
Percentage of
109% 150% 200%
b012/b212
Description
Description
b049=01 (ND )
Trip time (s)
60
0.5
0
116% 120% 150%
Percentage of
b012/b212
31