One Button Motor Speed Control (Pwm) - Maretron M-Power CLMD16 Configuration Manual

CLMD16 Configuration Guide___________________________________

One Button Motor Speed Control (PWM)

In the following example there is a windshield wiper motor that is PWM compatible for speed
control. The customer wants to have one Discrete I/O key that will turn the wiper motor On and
Off and use the same key to adjust the speed at start-up. One ECB output will be used as a
PWM type ECB to make this speed control happen however there is the need for a second
ECB to be used to enable the "Park" signal for the wiper motor. The "Park" signal needs to be
On whenever the wiper motor power / speed control ECB is Off. The following example shows
how this circuit type will be arranged using "Discrete I/O 3" as the circuit control.
Step 1:
Place desired parameters into the "Counter Element" that will be used for the speed control.
This example will use "One Button Smooth Scroll" as the "Counter Type" allowing for a loop of
steps in PWM from PWM "Min Set Point" to "Max set point" then back down to "Min set point"
in a continuous loop. The PWM counter does not start until the "Hold Step Time" is reached.
The "Hold Step Size" is 10% therefore giving the wiper motor a total of 9 speeds between 10%
PWM and 100% PWM.
50 CLMD16 Configuration Guide Rev.1.1