Intermec PC4 Programmer's Reference Manual page 40

Chapter 3 — Designing Bar Code Labels
Note: The optional Keyboard Display Unit automatically sends the UI
command at power-up.
26
The question mark (?) following the FR command is required for
printing any fields edited in Form Edit mode that contain variables or
counters. If no question mark is transmitted, all fields containing
variable input are omitted from the printout.
Variables and counter start values must be defined, either by
programming or by user input.
To have the printer prompt the operator to enter data, use the serial
interface for communication between printer and host and send a UI
command after each power-up, as shown.
Printer Prompt Command
UI
UI80,001
FR "TEST"
?
Enter Product EASYCODER Substitute variable V001
name:
Enter Model
501SA
number:
100001
100000
Number of label
sets
P1
P1
Copies of each
label
1
2
ESim for the PC4 and PF8 Printers Programmer's Reference Manual
Explanation
CR/LF to start command structure
Enables prompts command (optional)
Printer returns code page status
Retrieve form
Call for variables
Substitute variable V01
Reset, accept, or enter 2 counter start
value C0
Prompt
Ignore
Enter P and quantity of labels
Prompt
Enter number of copies