Section 1:
Introduction
Page 9
Copy Parameters Field
The Copy Parameter field is used to transfer the value of one drive parameter to another. Up to twenty parameter
copies can exist within a single Copy Parameter field.
If
Execute
is set to
On Select
then the text that is entered when the field is created will be displayed on the 2800
when the screen is displayed. If
Execute
is set to
Link ID
then the text that is entered when the field is created will
never be displayed. When the
Execute
method is
On Select
, moving the focus, via the
Select
key, to this field
and pressing the
Enter
key will cause the copy operations to execute. When a screen is first opened the various
field types that make up the screen go through an initialization procedure. This procedure places associated text
on the display and opens connections to the communication driver if the field type is a data access field such as a
Copy Parameter field.
If the
Execute
method selected for a Copy Parameter field is an
As LinkID
then the initialization procedure and
operation of the field are changed. A connection to the communication driver is still made but the field text is not
shown on the 2800 display and the field is not selectable using the
Select
key. A pointer to the Copy list is stored
in the internal memory of the 2800. To cause the field to execute a reference to it must be included within a
Recipe. This is done using the Copy Link ID parameter found within the Data Reference list. When the Copy Link
ID parameter is encountered within an executing Recipe field the execution process is transferred to the copy
parameter firmware which executes the copy parameter list. Once completed the execution process is returned to
the Recipe field. Within ScreenMaker 2000K the text associated with a Copy Parameter field is always shown,
must be at least one character, and may not be covered by another data access field. Once an
As LinkID
Copy
Parameter field is initialized within a screen the pointer to it which is stored within the 2800 memory is maintained
until power is removed or another
As LinkID
Copy Parameter of the same number is initialized. Because of this
you can initialize an
As LinkID
Copy Parameter field in one screen then reference it via a Recipe field in a
different screen.
PM2800U3K Revision 4
