SECTION 4 WSPC USER INTERFACE MANUAL
31
ADJUSTING CONTROL PARAMETERS
Listed below are the control parameters that can be
edited by the user at the “Adjustments” display. The
units and language appearing in the “Adjustments”
display correspond to the settings applied when the
User Profile was created. The WSPC must be
connected to the controller (by clicking the “Connect”
button) before parameter changes are allowed.
Many changes to the control parameters at the
WSPC interface will be reflected in the WS Controller
display on the compressor. However, the
compressor list is intentionally short, and limited to
adjustments that might be made frequently.
When a parameter change is made at the WSPC
interface, the corresponding change appears at the
controller after “Enter” is pressed on the PC
keyboard or the cursor is positioned outside of the
changed field. Likewise, a change made at the WS
Controller unit causes the corresponding value to
change at the WSPC interface.
To edit a control parameter value:
1. Select “Connect” in the Status Bar to connect
communication between the WSPC interface
and the WS Controller. Connection must be
enabled before adjustments can be made at
the Adjustments Display.
2. Click in the field of the parameter to be
changed and delete the current value. A
double-click in the parameter field will high-
light the entire value. When the parameter
value is highlighted, typing over the current
value will delete it and replace it with the new
value.
3. Type the new value into the selected field.
4. Press “Enter” on the PC keyboard or click
the mouse cursor on a different item. The
parameter value will turn red to indicate that
the request has been made.
5. If the request is valid, the new setting will
now be active (indicated by the color change
from red to black). If the parameter is invalid
or out of range the color will change to black
and the parameter will return to its previous
value.
ADJUSTABLE CONTROL PARAMETERS
The following three settings affect the compressor’s
response to line pressure. The compressor starts to
deliver air to the system whenever pressure falls
below the “Load” pressure and stops delivering air
whenever pressure rises above the “Unload”
pressure. “Load delta” is the difference between the
two”.
(Load Delta) = (Unload pressure) – (Load pressure)
Unload Pressure—Line pressure setpoint (psi, bar,
or kpa) at which the compressor will unload and stop
delivering air. When the Unload Pressure is
changed, the Load pressure will usually be held
constant, and the Load delta pressure differential will
change automatically.
Load Pressure—Pressure (psi, bar, or kpa) at which
the compressor motor will start and the compressor
will begin to deliver air. When the Load Pressure is
changed, the Unload pressure will usually be held
constant, and the Load delta pressure differential will
change automatically.
Load Delta—The pressure differential (psi, bar, or
kpa) below the unload pressure at which the machine
will begin loading. When the Load delta Pressure
differential is changed, the Unload Pressure will
usually be held constant, and the Load pressure will
be adjusted automatically.
VSD Setpoint Pressure— Available only with VSD
equipped machines. The targeted pressure for the
variable speed controls. This is normally adjusted
near the bottom of the load/unload band. The speed
will be adjusted to maintain this pressure. Most
packages will allow adjustment of this over a wide
range to allow tailoring of the pressure to the needs
of the application. Adjustments will be automatically
made to the maximum speed to operate the motor at
its full capacity at any pressure.
Unload Time (seconds)—Set this to the time that
the machine is to run unloaded in Automatic mode
before shutting off. This value is displayed in units of
minutes at the WS Controller.
Drain Interval (seconds)—Set this time as the
desired interval between activation of the drain cycle
for machines equipped with an electric solenoid
drain. This value is displayed in units of minutes at
the WS Controller.
Drain Time (seconds)—Set this time as the number
of seconds that the drain is to remain energized.
Restart Time (seconds)—Set this time to the
desired number of seconds before auto restart is to
occur on power up. Set it to zero (0) to disable auto
restart.
Wye-Delta Time (seconds)—Set this as the time for
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