Operation When An Error Is Detected; Operation When Error Is Detected; Data Reception Error - Epson TM-U220A Specification

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3) Unrecoverable errors
Error
R/W error in After R/W checking,
memory the printer does not
work correctly.
CPU execution CPU executes an
error incorrect address.
High voltage Power voltage is
error extremely high.
Low voltage Power voltage is
error extremely low.
Print head Abnormality in the
temperature print head
detection circuit temperature.
error
NOTE: If an error that cannot be recovered occurs, turn off the power as soon as possible.

3.5.2 Operation when an error is detected

The printer executes the following operations when detecting an error:
<Serial interface model>
• Stops all mechanical operations.
• Sets the DTR signal to MARK.
• Flashes the ERROR LED
• Transmits XOFF if XON/XOFF control is selected.
<Parallel interface model>
• Stops all mechanical operations.
• Sets the Busy signal to HIGH.
• Flashes the ERROR LED.
• Sets the nFault signal to LOW.

3.5.3 Data reception error

If any of the following data reception errors occur during serial interface communication, the printer
prints " ? " or ignores the data, according to the setting of DIP switch.
• Parity error
• Framing error
• Overrun error
EPSON
Table 3.5.3 Unrecoverable Errors
Description
TITLE
TM-U220A
Specification
(For Argentina Fiscal)
ERROR LED flashing pattern
Approximately 160 ms
Approximately 2.56 s
Approximately 2.56 s
Approximately 2.56 s
Approximately 2.56 s
Approximately 2.56 s
SHEET
REVISION
A
Recovery
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
NO.
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