SOLO BETA User Manual
“DIR” PIN:
This is the Direction control pin which is a digital pin, accepting voltage levels of 0V or 3.3V, so by
giving each of these values, the connected Motor to SOLO, will either rotate in C.W. direction or
C.C.W. direction.
Remember that DIR pin is NOT 5V tolerant and if you like to connect it to a 5V source, you must
use a resistor of a value between 1kΩ to 2.2kΩ (the exact value is not important, it just must be in
this range)
“P/F” PIN:
This is a pin with three main different functionalities depending on the control Mode and the type
of the motor you select as below:
In Open Loop mode of 3 phase motors :
It will act as increasing or decreasing the injected power into the Motor, so by applying 0V of
analogue voltage or 0% duty cycle of PWM, there will be no power injected inside the Motor, and
at 5V or 100% duty cycle of PWM, it will apply the maximum deliverable power into the Motor.
In Closed-Loop mode of DC, BLDC and PMSM motors:
It will act as the current Limit, so if the voltage applied to this pin is 5V, it will stop the current
floating to the motor ( current Limit at zero), and if this pin is left open it will allow up to 32A
floating into your Motor, so any value between these will define the value of current limit. You can
calculate the current limit value based on following formulas:
In case of using PWM:
The current Limit value = ((100 - duty cycle precentage of PWM at P/F input)/100) * 32.0
In case of using Analogue Voltages:
The current Limit value = ((5.0 - the voltage at P/F input)/5.0) * 32.0
www.solomotorcontrollers.com
January 2021 - Revision V_1.0.5 Copyright © 2020, All right Reversed. SOLO motor controllers.
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