ABB ACS880-04XT User Manual

Program features 103
Application control
 Application macros
Application macros are predefined application parameter edits and I/O configurations.
See chapter Application macros (page 131).
 Process PID control
There is a built-in process PID controller in the drive. The controller can be used to
control process variables such as pressure, flow or fluid level.
In process PID control, a process reference (setpoint) is connected to the drive
instead of a speed reference. An actual value (process feedback) is also brought
back to the drive. The process PID control adjusts the drive speed in order to keep
the measured process quantity (actual value) at the desired level (setpoint).
Process PID control operates on a 2 ms time level.
The simplified block diagram below illustrates the process PID control. For a more
detailed block diagram, see page 658.
The control program contains two complete sets of process PID controller settings
that can be alternated whenever necessary; see parameter 40.57 PID set1/set2
selection.
Note: Process PID control is only available in external control; see section Local
control vs. external control (page 24).
Process
PID
AI1
Process
actual
values
AI2
• • •
D2D
FBA
Setpoint
Speed, torque or
frequency
reference chain
Filter
Limitation

ABB ACS880-04XT Specifications

General

Brand	ABB
Model	ACS880-04XT
Category	Controller
Language	English