LXE 1280, Reference Manual

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Form Messages 131
E-SW-LDSPLUSRG-G LDS Plus Reference Guide
Form Message Header
The form message header is the first three text characters of a form. The form message header is a
way to identify the form.
The following message illustrates the location of the form message header:
AB] is the form message header
in this form message.
<02Sa AB] Part No:_ _ _ _ Loc:_ _ _ Qty:_ _ _ _
Figure 4-28 Form Message Header Location
First Character
The first character of the form identifies the specific form and may be any character of the ASCII
printable subset 20 through 7E.
Exception: You cannot send the less than < symbol (ASCII 3C) as the first form character.
The less than symbol can only be used as a start of line character.
Second Character
The second character of a form determines the type of input device that the operator can use to
enter data on a form.
The barcode and/or auxiliary input features can be activated by the form itself according to the
second character position of the form:
Typical Characters Effect on DOS Terminal
A Activates aux. input device
B Activates a barcode device
C Activates both barcode and aux. input device
D Activates neither barcode nor aux. input device (Keyboard entry only)
Since the second character of the form label is bit encoded, there are other letters which have the
same effect. There is no reason to use anything other than A, B, C, or D. Refer to Appendix D,
“Code Tables and Character Sets”, for all control characters.