Error Processing; Printer Operation When An Error Occurs; Data Receive Error; Buffer Full Printing - Epson TM-U200 Series Technical Manual

C o n fid e n tia l

Error Processing

Printer Operation When an Error Occurs

The printer executes the following operations upon detecting an error:
Serial interface
All mechanical operations stop.
DTR signal is set to MARK (only when DTR/DSR is selected and DIP switch 1-8 is off).
The ERROR LED blinks.
XOFF is transmitted when XON/XOFF control is selected (only when DIP switch 1-8 is off).
Parallel interface
All mechanical operations stop.
The BUSY signal is set to HIGH (only when DIP switch 1-8 is off).
The ERROR LED blinks.
Fault signal is set to LOW.

Data Receive Error

If one of the following errors occurs, the printer prints "?" or ignores the data, depending on the
setting of DIP switch 1-1:
Parity error
Framing error
Overrun error.

Buffer Full Printing

When subsequent data is received after the printer processes one line of data in the print buffer,
the printer automatically prints the processed data and feeds the paper one line.

Detectors and Printing

When the printer detects a paper near-end, it stops or continues printing, depending on the
ESC c 4 command setting. The roll paper detector always halts printing when there is no paper.
Rev. A
TM-U200 Series (Type A/AM) Technical Manual
Features and General Specifications 1-29