Epson TM-T70 Instruction Manual download pdf (Page 55)

Rev. A ESC/POS Command-related Information 4-1

TM-T70 Technical Reference Guide

Chapter 4

ESC/POS Command-related Information

This chapter introduces the printer operation settings, which can be made by using ESC/POS

commands, and precautions for those operation settings.

4.1 NV Memory (Non-volatile Memory)

The printer’s NV memory can be roughly divided into three parts:

• Firmware program area

• NV memory area for product information (This area cannot be edited by the user.)

• NV memory area that the user can access

The following areas are in the NV memory that the user can access:

• NV user memory

•NV graphics memory

• User-defined character code page (“C.11 Page 255 (Blank Page)”)

• Area of user-defined command default values

You can customize your printer by changing these values. Note the following when writing to

and deleting from NV memory.

❏ The following restrictions apply when performing non-volatile memory operations

(including data writing and deleting).

• Do not press the FEED button.

• Do not turn off the power.

• Do not execute a real-time command.

• The ASB status is not sent, even when the ASB function in ESC/POS commands is set to

Enabled.

❏ The printer sometimes enters the BUSY state while data is written to NV memory. It is

important not to send data from the host computer while the printer is BUSY, because the

printer cannot process any received data.

❏ Frequent use of the functions for writing data to and deleting data from NV memory may

damage the memory. As a rule in using the various commands to write to NV memory,

avoid writing more than an average of ten times per day.

4.1.1 Using NV Memory

You can use the free area in NV memory for writing memos, for other character information, for

anything you like. Data written to this area is held in the memory even if you turn off the power.

For details on how to read and write data, see the “ESC/POS Application Programming Guide.”

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Epson TM-T70 Instruction Manual Page 55