Sequential control macro
The Sequential control macro is suited for speed control applications in which a speed
reference, multiple constant speeds, and two acceleration and deceleration ramps can
be used.
Only EXT1 is used in this macro.
The macro offers seven preset constant speeds which can be activated by digital inputs
DI4…DI6 (see parameter 22.21 Constant speed function). An external speed reference
can be given through analog input AI1. The reference is active only when no constant
speed is activated (digital inputs DI4…DI6 are all off). Operational commands can also
be given from the control panel.
The start/stop commands are given through digital input DI1; running direction is
determined by DI2.
Two acceleration/deceleration ramps are selectable through DI3. The acceleration and
deceleration times, as well as ramp shapes, are defined by parameters 23.12…23.19.
￭ Operation diagram
The figure below shows an example of the use of the macro.
Speed
Time
Stop along deceleration
ramp
Speed 3
Speed 2
Speed 1
Accel1
Accel1
Accel2
Decel2
Start/Stop
Accel1/Decel1
Speed 1
Speed 2
Accel2/Decel2
Speed 3
Application macros 125
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