Epson TM-U220 ePOS-Print XML Users Manual - Page 18

Restrictions, Disable the command execution offline.

Page 18 highlights

Chapter 1 Overview Restrictions ❏ The drawer and the buzzer cannot be used together. ❏ The buzzer function cannot be used if the printer is not provided with the buzzer. ❏ When multiple tones are set for raster images, intermitting printing may occur because the amount of data to print increases and white stripes may appear in the print result. ❏ The scan quality of barcodes/2D-codes printed as multiple-tone raster images cannot be guaranteed. Print them as two-tone images. ❏ If printing was cancelled, perform the following settings to clear the data left in the printer.  (in ePOS-Print Service Ver.3.0 and later)  In the printer DIP switches (memory switches), configure the Busy condition only for the receive buffer full.  Disable the command execution (offline). ❏ Messages that contain BOM are not supported. ❏ Printing is not possible with a software application for iOS9 built on the Xcode development environment for iOS, because HTTP communication is not allowed by APP Transport Security. We recommend to develop your application on Epson ePOS SDK for iOS.  https://reference.epson-biz.com/pos/reference/ ❏ Only UTF-8 character encoding is supported. 18

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18
Chapter 1
Overview
Restrictions
The drawer and the buzzer cannot be used together.
The buzzer function cannot be used if the printer is not provided with the buzzer.
When multiple tones are set for raster images, intermitting printing may occur because the amount of data to
print increases and white stripes may appear in the print result.
The scan quality of barcodes/2D-codes printed as multiple-tone raster images cannot be guaranteed. Print
them as two-tone images.
If printing was cancelled, perform the following settings to clear the data left in the printer.
(in ePOS-Print Service Ver.3.0 and later)
In the printer DIP switches (memory switches), configure the Busy condition only for the receive buffer full.
Disable the command execution (offline).
Messages that contain BOM are not supported.
Printing is not possible with a software application for iOS9 built on the Xcode development environment for
iOS, because HTTP communication is not allowed by APP Transport Security. We recommend to develop your
application on Epson ePOS SDK for iOS.
Only UTF-8 character encoding is supported.