Specifications

Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET NEXT
D
TM-U230
Specification
(STANDARD)
10 11
2. CONFIGURATION
2.1 Interface Specifications
2.1.1 RS-232 serial interface
2.1.1.1 Specifications
Data transmission: Serial
Synchronization: Asynchronous
Handshaking: DTR/DSR or XON/XOFF control
Signal levels: MARK = -3 to -15 V ... logic ‘1’ / OFF
SPACE = +3 to +15 V ... logic ‘0’ / ON
Baud rate: 4800, 9600 bps [bps: bits per second]
Data word length: 7 or 8 bits
Parity: None, even, odd
Stop bits: 1 or more (Data transmitted from the printer has 1 stop bit (fixed))
Connector: D-SUB 25 (female) or equivalent
2.1.1.2 Online/offline switching
The printer does not have an online/offline button. The printer goes online or offline under the following
conditions:
<Conditions to go offline>
1) Between the time when the power is turned on (including reset using the interface) and when the
printer is ready to receive data.
2) During the self-test.
3) When the cutter cover is opened.
4) During paper feeding using the FEED button.
5) Between the time when the printer stops printing due to a paper-end and when the online recovery
wait time finishes after loading paper.
6) When an error has occurred.
<Conditions to go online>
1) Automatically after the time when the power is turned on (including reset using the interface) when
the printer is ready to receive data.
2) Automatically after the self-test.
3) Automatically after the paper feeding is stopped by releasing the FEED button.
4) After the time when the paper loading is completed, using GS z 0 command. The operation
differs for each model type.
(default: t2 =0)
After the time when the FEED button is pressed while the PAPER OUT LED is blinking after the
paper loading is completed.