Intermec EasyCoder PL3 Programmer's Reference Manual page 99

Chapter 8— Advanced Commands
Format:
{command} {beep_length}
where:
{command}: BEEP
{beep_length}: Duration of beep, specified in 0.125-second increments.
Example: This example instructs the printer to beep for 2 seconds (16 x 0.125
second = 2 seconds).
Input (BEEP.LBL):
! 0 200 200 210 1
CENTER
TEXT 5 0 0 10 beeps for two seconds
beep 16
FORM
PRINT
EasyCoder PL-Series Printer Programmer's Reference Manual 81