High Country Tek MVP-F Series - Manual (Page 11)

021-MVP-F Rev A MVP-F User Manual 11
Copyright © High Country Tek, Inc. – 2013
MVP-F
Closed-loop Controller
MVP-Fxx - The title parameter is fixed. It displays the model number and the firmware version.
MODE - Three modes of operation.
1. Normal – standard operating mode where increasing output results in increasing feedback.
2. Inverse – the inverted mode where increasing output results in decreasing feedback.
3. Open loop – the feedback is not used and the output current is proportional to the command.
PROPORTIONAL GAIN – Sets the P term in a PID control loop. It is a multiplication of the error added to the
output. The higher the setting, the faster the response will be. Also, higher settings result in shorter ramp time,
but it can cause oscillation. It is variable type.
INTEGRAL GAIN – Sets the I term in a PID control loop. It is the sum of the error over time. It overcomes an offset
in the output or to correct for very small deviations. A higher gain will result in more integral control but can
cause oscillation. It is variable type.
DERIVATIVE GAIN – Sets the D term in a PID control loop. It is the rate of change of error. The higher the
derivative gain, the quicker the system will respond to sudden changes. It is variable type.
PID LOOP TIME – Sets the PID loop closure time in number of dither cycles. The lower the number, the more
quickly the system will respond to error. It is variable type.
DITHER FREQ. – Set the PWM or dither frequency according to the valve specifications. This parameter is
variable. Options: 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 350, 400, 500, 1000Hz.
MIN COMMAND - Sets the minimum command input. A command signal below this value will be handled
according to the “COMMAND BELOW MIN” parameter. The value in the brackets is the present command
input.
MAX COMMAND - Sets the maximum command input. A command signal above this value will be handled
according to the “COMMAND ABOVE MAX” parameter. The value in the brackets is the present command
input.
MIN FEEDBACK - Sets the minimum feedback input. A feedback signal below this value will be handled according
to the “FEEDBACK BELOW MIN” parameter. The value in the brackets is the present feedback input.
MAX FEEDBACK - Sets the maximum feedback input. A feedback signal above this value will be handled
according to the “FEEDBACK ABOVE MAX” parameter. The value in the brackets is the present feedback
input.
MIN OUTPUT - Sets the minimum output current (milliamps, amps for -12A,-25A). The value in the brackets is the
present output current.
MAX OUTPUT - Sets the maximum output current (milliamps, amps for -12A,-25A). The value in the brackets is the
present output current.