User guide

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 113
Editing a Display Screen
You can edit the object script using the Edit Display
Script window. Editing consists of adding
comments, changing field values or display variable
types and field and line numbers. If you make a
mistake in the editing, an error message will be
displayed above the window otherwise the “No
Script Errors” message appears. The Display Script
window reflects the display variables v1 to v24
substitution in the script (i.e. *V1*). Each defined
variable has a line and field specification. Line is
the object line number and Field is the object field
number from 1 to N. The /../ pair delineate an
object’s field.
Comments can be inserted on their own line or at
the end of an object line. Comments start with a
single apostrophe and continue to the end of the
line.
When the application runs and a screen is called
out the V1 - V24 variable values are inserted into the object script in the format specified for that screen based
on the variable’s type and transmitted to the D206 display over the RS232 interface. If the any field has an
invalid specification (such as a non defined color text field etc.) the script will be displayed on the D206 display
with the line, field and error type of the first error displayed. Note that you will see abbreviations for the object
name along with the field names removed. This is done to speed up the downloading of the object script to the
display. The field in error is easily deduced.
Step 3: Bringing up a Screen on the display
Generally displaying screens and handling
object touches is handled in its own logic
sequence. The logic sequence is
organized as follows. Each screen has a
bubble and the transition between screens
is controlled by the gd.key and gd.value
values. You navigate between the screens
based on touching objects or other external
events.
Example logic sequences are available
from HCT customer support.