Citizen CBM-272, Руководство пользователя

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[Note] 1. The RS-232C signals are based on the EIA RS-232C.
2. The received data should be always maintained in the Mark status when
no data is being transferred.
Applicable connectors (D-Sub connectors)
Printer side : 17LE-13250 (Anphenol) or its equivalent
Cable side : 17JE-23250 (Anphenol) or its equivalent
7.3 Input and Output Signals
7.3.1 Input and Output Signals
(1) RXD
Serial received data signal. If a framing error, overrun error, or parity error
takes place, the relevant data will be printed as “?”.
(2) DTR
Write the data or a command when this signal is Ready. If you write at Busy,
the previous data will be ignored, resulting in an overrun error. The data can
be written in the input buffer even during printing. BUSY also occurs at power
on, during test print, in Online mode, on reset, or in low voltage state (selected
with DS1-5).
(3) TXD
If the remaining capacity of the input buffer comes to 128 bytes or less while
receiving the data, DC3(13H) will be output as a data not receivable signal. If
the remaining capacity comes to 256 bytes or more, DC1(11H) will be output
to the host side as a data receivable signal.
When sending the status information, it is confirmed that DSR is a space prior
to sending the data, if DTR/DSR control has been selected. If DTR/DSR control
has not been selected, the data will be sent, ignoring the DSR signal.
(4) FG
Ground for the case
(5) GND
Common ground for the circuits