High Country Tek epc-2, Dual Channel GUI Software - Manual (Page 11)

Electronic Controller Solutions for the Global Fluid Power Industry
Appendix A: Dual Path with Single coil connections
This option allows each input to control one
output channel and take full advantage of
the 10 bit ( 1024 steps ) resolution offered by
the epc-2controller.
The dead band is internally set to approx.
±5% of the chosen command, shown here at
250mV for a 5V input and is to allow for any
mechanical wear, tolerance or movement in
the command potentiometer or joystick.
When using 4 to 20mA, the deadband is still
±5% which equates to approx. 0.8mA
This option allows each input to control one
output channel but two valve coils. The input
command signal is configured such that at
~mid-value, both coils are OFF.
The command dead-band is internally set to
±5% as before and as soon as this level is
seen, the output immediately jumps to the
relative Imin setting and smoothly proceeds
from there to Imax for max command.
Coil A command is from ~mid value to +max
value ( i.e. 2.5V to +5VDC ) while Coil B
command is from ~mid value to +0 value
( i.e. 2.5V to 0V ).
Appendix A: Dual Path with Dual coil connections
Input /Output Function Curve:
The epc-2 has the patented HCT I/O curve function integrated into the application
software and is available to allow the user to change the relationship between input
command and output current to something other than linear if required.
This unique feature give precise optimization of machine control needs when
options such as ‘creep’ and ‘full speeds’ are needed from a single manual joystick
movement.
This adjustment has restricted access to avoid any issues
with standard operation but can easily be changed by a
qualified HCT Intella™ software programmer user using the
free HCT Program Loader Monitor (PLM).
Please contact the HCT customer service or your local
distributor for details on how to access this feature or to find
your nearest qualified Intella™ software programmer.
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