Contents, cont'd. - Intermec

CLL
Chapter 2 Program Instructions
Field of Application Statement for partial or complete clearing of the print image buffer.
Syntax CLL []
optionally specifies the field from which the print image buffer
should be cleared.
Remarks The print image buffer is used to store the printable image after processing
awaiting the printing to be executed. The buffer can be cleared, partially or
completely, by the use of a CLL statement:
- CLL partially clears the buffer from a specified field to the end of
the program. The field is specified by a FIELDNO function.
Partial clearing is useful in connection with print repetition. To avoid
superfluous reprocessing, one or several fields can be erased from the buffer
and be replaced by other information, while the remaining parts of the label
are retained in the buffer.
Note that there must be no changes in the layout between the PRINTFEED
and the CLL statements, or else the layout will be lost. Also note that partial
clearing always starts from the end, i.e. the fields which are executed last
are cleared first.
- CLL (without any field number) clears the buffer completely.
When certain error conditions have occurred, it is useful to be able to clear
the print image buffer without having to print a faulty label. Should the error
be attended to, without the image buffer being cleared, there is a risk that
the correct image will be printed on top of the erroneous one on the same
label. It is therefore advisable to include a CLL statement in your errorhandling
subroutines, when you are working with more complicated
programs, in which all implications may be difficult to grasp.
Examples Partial clearing:
Two labels are printed, each with two lines of text. After the first label is
printed, the last line is cleared from the print image buffer and a new line is
added in its place on the second label:
10 PRPOS 100,300
20 FONT "Swiss 721 BT"
30 PRTXT "HAPPY"
40 A%=FIELDNO
50 PRPOS 100,250
60 PRTXT "NEW YEAR!"
70 PRINTFEED
80 CLL A%
90 PRPOS 100,250
100 PRTXT "BIRTHDAY!"
110
RUN
PRINTFEED
Intermec Fingerprint 7.2 – Reference Manual Ed. 3 38