Parker Vansco VMM1210 - Page 64

54 VMM1210
Application Examples
software. Refer to the appropriate software manual, or contact your Parker
Vansco Account Representative for more details about software. This section
only provides hardware connection information.
To do this, you would use a high-side output with PWM capabilities to control the
speed of the motor, and a DC-coupled frequency input to monitor the output from
the motor.
The application code should be written so that the PWM duty cycle for the high-
side output is adjusted to achieve a target speed (frequency) for the motor.
 If the frequency feedback is lower than target, the PWM duty cycle should
increase to boost the average current through the motor to speed it up.
 If the frequency feedback is higher than target, the PWM duty cycle should
decrease to reduce average current through the motor to slow it down.
The following shows how to connect the VMM1210 to control the speed of a
motor:
Internal to product
Motor
Frequency Input
High-Side Output
(PWM)
Battery Voltage
Figure 28: Connection for controlling motor speed