Closed-loop valve controller – High Country Tek DRF Series User Manual

Page 12

021-DRF Rev A

DRF User Manual

– 2013

DRF

Closed-loop Valve Controller

PID LOOP TIME - Sets the PID loop closure time in number of dither cycles. The lower the number, the more

quickly the system responds to error. It is a variable type.

DEADBAND - Sets the error tolerance of the PID loop. The control will only respond to error greater than the

Deadband parameter. For a velocity loop the output will remain at a fixed level. For a position loop both
outputs will remain off. This parameter is a variable type.

Cx MIN INPUT - Sets the minimum command input. The input can be inverted. The value in the brackets is the

present command input.

Cx MAX INPUT - Sets the maximum command input. The input can be inverted. The value in the brackets is the

present command input.

Cx MIN OUTPUT - Sets the minimum output current (milliamps for -06A, amps for -12A,-25A). The value in the

brackets is the present output current.

Cx MAX OUTPUT - Sets the maximum output current (milliamps for -06A, amps for -12A,-25A). It cannot be

inverted. The value in the brackets is the present output current.

Cx RAMP UP/DOWN - Sets the time for Output current to ramp UP or Down through the full input range. These

parameters are variable.

DITHER FREQ.

– Options: 30, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, and 1000 Hz. Set the PWM or

dither frequency according to the valve specifications. This parameter is variable.

Cx COMMAND INPUT - Displays the present input. This parameter is a monitor type.

Cx OUTPUT CURRENT - Displays the present output current. This parameter is a monitor type.

SUPPLY VOLTAGE - Displays the

module’s power supply voltage. It is helpful for troubleshooting. This parameter

is a monitor type.

FAULT STATUS - The STATUS LED will flash red 2 times for Coil Open and 3 times for Coil Short in both open-

loop modes and closed-loop modes.

In open loop mode, the LED will continue to flash until clearing faults by moving the command signal out of
active range or cycling the power.

In closed-loop mode, only power cycle can clear the faults.