Chapter 7 — Commands
ESim for the PC4 and PF8 Printer Programmer’s Reference Manual 119
USR - Read Serial Number
Purpose: This command is used to read the serial number in EEPROM.
Syntax: USR
UV - Product Identity and Asian Font Types
Purpose: This command generates output on the RS-232 or USB port
about the software and fonts stored in the memory cartridge.
Syntax: UV
Remarks: The first line returned after the UV command is base software
appended by a CR/LF, the next is one line with information on
the font appended by CR/LF.
V - Define Variable
Purpose: This command is used to define variable data fields for use in
stored forms.
Syntax: Vp
1
,p
2
,p
3
,“PROMPT”.
Note: This command can only be used on PF8 printers.
V Command Parameter Descriptions
Parameter Description
p
1
Variable reference number (00-99).
A maximum total of 1500 bytes of data for all variables is
allowed.
p
2
Maximum number of digits for the variable
(1-99).
A maximum total of 1500 bytes of data for all variables is
allowed.
p
3
Field justification:
L = Left justification.
R = Right justification.
C = Center justification.
N = No justification.
[-] A single leading minus sign in the prompt field causes
the prompt to be sent one time only after the form is
retrieved (Keyboard Display Unit only).
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