Epson TM-T20 Technical Reference Guide

20
NV Memory (Non-Volatile Memory)
The printer's NV memory stores data even after the printer power is turned off. NV memory
contains the following memory areas for the user:
•NV graphics memory
• User NV memory
•Memory switches
•R/E (Receipt Enhancement)
•User-defined page
•Maintenance counter
NV Graphics Memory
Graphics, such as shop logos to be printed on receipts, can be registered. Even with a serial
interface model whose communication speed is low, high speed graphic printing is possible.
Use the TM-T20 Utility to register graphics. You can also use the TM-T20 Utility or the NV
graphics information print mode to print and con
firm the registered graphics.
User NV Memory
You can store and read text data for multiple purposes, such as for storing a note including
customizing or maintenance information of the printer.
Use ESC/POS commands to store and read the text data.
Memory Switches
With the memory switches, which are software switches for the printer, you can configure
various settings of the printer. For information about the memory switch, see "Setting the
Memory Switches/Receipt Enhancement" on page 43.
NV memory can be rewritten about 100,000 times. As a guide, NV memory rewriting should
be used 10 times or less a day when you program applications.
• For information about the TM-T20 Utility, see the TM-T20 Utility User’s Manual.
• For information about how to use the NV graphics information print mode, see "NV
Graphics Information Print Mode" on page 69.
For information about ESC/POS commands, see the ESC/POS Application Programming
Guide.

Epson TM-T20 Specifications

General

Autocutter	Yes
Print Method	Line thermal
Paper Width	79.5 ±0.5 mm
Interface	USB, Ethernet
Dimensions	140‎ x 199 x 146 mm (Width x Depth x Height)
Power Supply	External power supply
Paper Thickness	0.06 - 0.085 mm