Cytron Single 10- 45V, 40A Brushed DC Motor Controller : Data Sheet : Page 14

ROBOT . HEAD to TOE

Product User’s Manual – MDS40B



8.1 RC INPUT MODE

In RC input mode, the speed and direction of the motor is controlled by the signal from the

standard hobby radio control transmitter and receiver, or a microcontroller generating the

similar signal.

NOTE: The RC transmitter must be ON before power up the Enhanced SmartDrive40.

RC Input mode is selected by setting the SW1 & SW2 to 0 (Down). SW3 – SW6 can be

configured depending on the requirement of the user.

Input Mode

SW1:SW2

00

RC Input Mode

Single/Mix Mode

SW3:SW4

00

10

11

Independent – The motor speed and direction are controlled by a single

RC channel connected to Input 1. Motor stops when the input signal is

at the center point. Input 2 is not used in this mode.

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.

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.

Exponential Mode

SW5

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 thus soften the control

around the center zero speed point. This is suitable for high speed and

very sensitive motor.

MCU Mode

SW6

0

1

Off – The center point will be calibrated upon power up. Timeout

occurs after lost of signal for 100ms and the motor will be stopped for

safety purpose.

On – The center point is fixed at 1.5ms and the timeout feature is

disabled. Motor will continue to run with previous speed if new signal is

not detected. This is useful when a microcontroller is used to control the

motor. The microcontroller does not need to send the pulse continuously

to the Enhanced SmartDrive40. Instead, it only needs to send a single

pulse when the speed or direction of the motor needs to be changed.

0 – OFF 1 – ON X – Don’t Care