High Country Tek DRF Series - Manual (Page 12)

021-DRF Rev A DRF User Manual 12
Copyright © High Country Tek, Inc. – 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.