Torque control macro
This macro is used in applications in which torque control of the motor is required. These
are typically tension applications, where a particular tension needs to be maintained in
the mechanical system.
Torque reference is given through analog input AI2, typically as a current signal in the
range of 0…20 mA (corresponding to 0…100% of rated motor torque).
The start/stop signal is connected to digital input DI1. The direction is determined by
DI2. Through digital input DI3, it is possible to select speed control (EXT1) instead of
torque control (EXT2). As with the PID control macro, speed control can be used for
commissioning the system and checking the motor direction.
It is also possible to change the control to local (control panel or PC tool) by pressing
the Loc/Rem key. By default, the local reference is speed; if a torque reference is
required, the value of parameter 19.16 Local control mode should be changed to Torque.
A constant speed (by default, 300 rpm) can be activated through DI4. DI5 switches
between acceleration/deceleration time sets 1 and 2. The acceleration and deceleration
times, as well as ramp shapes, are defined by parameters 23.12…23.19.
￭ Default parameter settings for the Torque control macro
Below is a listing of default parameter values that differ from those listed for the Factory
macro in Parameter listing (page 136).
Torque control macro defaultParameter
DI319.11 Ext1/Ext2 selection
Torque19.14 Ext2 control mode
Level20.2 Ext1 start trigger type
In1 Start; In2 Dir20.6 Ext2 commands
Level20.7 Ext2 start trigger type
DI120.8 Ext2 in1 source
DI220.9 Ext2 in2 source
DI620.12 Run enable 1 source
DI422.22 Constant speed sel1
DI523.11 Ramp set selection
AI2 scaled26.11 Torque ref1 source
Not selected31.11 Fault reset selection
122 Application macros
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