ZG310 Thermal Printer User Instructions
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2.2.1 Application Program
Once communications between your computer and the printer have been established,
you can try driving the printer from your application program.
As referred to in the Programmers Guide, the ZG310 has a control code set based on
the EPSON ESCPOS protocol. Many of the commands are as closely compatible as
they can be, given the mechanical differences between printers, but if the application
program was originally written for another printer, it may need to be modified.