ABB ACS880 Series, Руководство по прошивке

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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 .
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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 174) .
Torque control macro default Parameter
DI3 19.11 Ext1/Ext2 selection
Torque 19.14 Ext2 control mode
Level 20.2 Ext1 start trigger type
In1 Start; In2 Dir 20.6 Ext2 commands
Level 20.7 Ext2 start trigger type
DI1 20.8 Ext2 in1 source
DI2 20.9 Ext2 in2 source
DI6 20.12 Run enable 1 source
DI4 22.22 Constant speed sel1
DI5 23.11 Ramp set selection
AI2 scaled 26.11 Torque ref1 source
Not selected 31.11 Fault reset selection
160 Application macros