Data Sheet

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ROBOT.HEADtoTOE
ProductUser’sManual–MDS40B
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8.2ANALOG/PWMINPUTMODE
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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.
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NOTE: The Analog/PWM signal to stop the motor (2.5V if SignMagnitude mode is off,             
0V otherwise) must be available when the Enhanced SmartDrive40 is turned on. Else, the             
driverwillshowInputErroruntilthecorrectsignalisavailable.
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Analog input mode is selected by setting SW1 to 0 (Down) and SW2 to 1 (Up). PWM input                 
mode is selected by setting SW1 to 1 (Up) and SW2 to 0 (Down). SW3 – SW6 can be                  
configureddependingontherequirementoftheuser.
InputMode
SW1:SW2
01
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10
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Analog Input Mode – 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.
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PWM Input Mode – 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 SignMagnitude mode is turned            
on.
Single/MixMode
SW3:SW4
00
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10
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11
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Independent – 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.
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Mixed Right – 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.
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Mixed Left – 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.
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ExponentialMode
SW5
0
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1
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Off – The speed is linear with the input signal. This is for low to              
mediumspeedmotor.
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On –The response to input is exponential and thus soften the          
control around the center zero speed point. This is suitable for          
highspeedandverysensitivemotor.
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CreatedbyCytronTechnologiesSdn.Bhd.–AllRightsReserved 17
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