Free cursor
On screens containing many setpoints, a specific SOFT key may not be assigned to each setpoint
value. A SOFT key will be assigned to enable the cursor arrow keys below the numeric keypad which
are used to HIGHLIGHT the desired setpoint field. At this point, the Enter key is pressed to bring up
a dialog prompting the user to enter a new setpoint value. The (X) key cancels cursor mode (see the
for an example).
Navigation
In order to maximize the amount of values which the panel can display to the user, and in order
to place those values in context, multiple screens have been designed to describe the chiller
operation. In order to move from one screen to the next, navigation keys have been defined.
These keys allow the user to either move FORWARD to a subscreen of the present screen, or move
BACKWARD to the previous screen. Except for the HOME Screen display, the upper-right SOFT key
will always return the user to the HOME Screen. Navigating with SOFT keys is as simple as pressing
the key next to the label containing the name of the desired screen. The system will immediately
refresh the display with the graphics for that screen. Following is a layout of all the screens and how
they are connected.
Figure 23: Screen layout
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
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