ABB ACS850 series, Firmware Manual

Page: 60 / 260

60 Application macros
Sequential control macro
The Sequential control macro is suited for speed control applications in which speed
reference, multiple constant speeds, and two acceleration and deceleration ramps
can be used.
The macro offers seven preset constant speeds which can be activated by digital
inputs DI4…DI6 (see parameter
26.01 Const speed func ). Two acceleration/
deceleration ramps are selectable through DI3.
An external speed reference can be given through analog input AI1. The reference is
active only when no constant speed is activated (all of the digital inputs DI4…DI6 are
off). Operational commands can also be given from the control panel.
Operation diagram
The figure below shows an example of the use of the macro.
Stop along
deceleration ramp
Speed
Time
Accel1 Accel1 Accel2 Decel2
Start/Stop
Accel1/Decel1
Speed 1
Speed 2
Accel2/Decel2
Speed 3
Speed 1
Speed 2
Speed 3