Product User’s Manual –
8.2 ANALOG/PWM INPUT MODE
In Analog/PWM input mode, the speed and direction of the motor is controlled by the analog
voltage or PWM signal. The valid input range is 0 – 5V and it’s very easy to control by using
a potentiometer. For example, the motor can be controlled by a joystick or foot pedal with
potentiometer.
NOTE:
The Analog/PWM signal to stop the motor (2.5V if SignMagnitude mode is off,
0V otherwise) must be available when the SmartDrive40 is turned on. Else, the driver will
show Input Error until the correct signal is available.
Analog/PWM input mode is selected by setting
SW3 to 0 (Down) and SW4
to
1 (Up)
. SW1
– SW2 and SW5 – SW8 can be configured depending on the requirement of the user.
PWM Mode
SW1:SW2
00
11
Off
The input is analog signal. The filter capacitor is not
connected and the input signal is not filtered. SW1 is for Input 1
while SW2 is for Input 2.
On
The input is PWM signal. The filter capacitor is connected
and the input signal is low pass filtered to be an analog signal.
SW1 is for Input 1 while SW2 is for Input 2. SW2 must be set to
0 if SignMagnitude mode is turned on.
Input Mode
SW3:SW4
01
Analog/PWM Input Mode.
Single/Mix Mode
SW5:SW6
0X
10
11
Single Channel Mode
The motor speed and direction are
controlled by a single channel connected to Input 1. Motor stops
when the input signal is at the center point. Input 2 is not used in
this mode.
Left Mix Mode*
This mode should be selected for the left
motor of the robot differential drive system. Input 1 controls the
overall speed as well as forward/backward movement of the
robot. Input 2 controls the left/right or pivot movement of the
robot. In left mix mode, the motor will be slowed down when the
robot is commanded to turn left and vice versa. SW8 must be set
to 0.
Right Mix Mode*
This mode should be selected for the right
motor of the robot differential drive system. Input 1 controls the
overall speed as well as forward/backward movement of the
robot. Input 2 controls the left/right or pivot movement of the
robot. In right mix mode, the motor will be slowed down when
the robot is commanded to turn right and vice versa. SW8 must
be set to 0.
Exponential Mode
SW7
0
1
Off
– The speed is linear with the input signal. This is for low to
medium speed motor.
On
–The response to input is exponential and this soften the
control around the center zero speed point. This is suitable for
high speed and very sensitive motor.
SignMagnitude
Mode
SW8
0
Off
– Motor stops when the input signal is 2.5V. Motor moves in
one direction when the input is < 2.5V and in another direction
Created by Cytron Technologies Sdn. Bhd. – All Rights Reserved
24