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Confidential
2. CONFIGURATION
2.1 Interface Specifications
2.1.1 RS-232 Serial Interface
2.1.1.1 Specifications
Data transmission:
Synchronization:
Handshaking:
Signal levels:
Baud rate:
Data word length:
Parity:
Stop bits:
Connector:
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) When the printer cover is open
2) Between the time when the power is turned on and when the printer is ready to receive data.
3) During the self-test.
4) During paper feeding using the receipt/journal paper feed button.
5) During the printer stops printing due to a paper-end.
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 receipt/journal paper feed button.
4) After the time when the paper loading is completed, using DLE ENQ 1 or DLE ENQ 2 command.
The receipt/journal paper out (PAPER OUT) LEDs are off after the paper loading is completed.
EPSON
Serial
Asynchronous
DTR/DSR or XON/XOFF control
MARK = -3 to -15 V ... logic '1' / OFF
SPACE = +3 to +15 V ... logic '0' / ON
9600 , 19200 bps (bps: bits per second)
7 or 8 bits
None, even, odd
1 or more
D-SUB 25 (female) or equivalent
TITLE
RP-U420 series
Specification
(STANDARD)
SHEET
NO.
REVISION
NEXT
B
10
SHEET
9
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