Lite-On Technology Corp.
Industrial Automation
166
Analog command smoother
The analog command smoother is provided primary to offer the buffering when the analog input signal
changes too fast.
The S-curve generator for analog speed allows the smoothing of the analog input command. Its time
planning is the same as the one for the S-curve of general speed. The speed and acceleration curves are
continuous. The graph above illustrates the schematic diagram for the S-curve generator for analog
speed. The slopes of the rotation speed command referred during acceleration and deceleration are
different. It is evident that how the command is followed. The poor following property shows in the
graph. The user may
adjust the time setting (PB-03, PB-04 and PB-05) based on the actual situation for improvement.
Low-pass filter at the command end
The low-pass filter at the command end is usually used to attenuate unneeded high-frequency response
or noise while smoothing the command.
Relevant parameters:
PB-00
SFIL
Acceleration-deceleration smoothing
constant of the analog speed command
Communication
address:
0100H
0101H
Initial value
0
Control mode
S
Unit
ms
Configuration range
0 ~ 1000 (0: The function is
turned off.)
Data size
16bit
Data format
Dec
7.3.4.
Proportioner at the analog command end
The speed command of motor is controlled by the analog voltage difference between V_REF and
VGND. The slope and range of speed control is adjusted by adapting to the proportioner of Internal
Parameter PA-17.
Target value
Time
