Input And Output Signals - Citizen iDP-460 User Manual

7.3 Input and Output Signals

7.3.1 Input and Output Signals
(1) RD
This is a serial received data signal.
data is printed as "?" or discarded.
illuminated.
(2) DTR
When this signal is Ready, write the data or a command.
error results, ignoring the previous data.
printing.
(3) TD
When a command is received, that requests the printer state and printer status, 1-byte corresponding
data is output.
(4) DSR
When this signal is a space, the data is sent from the printer side.
when a request to send command is executed, the printer will wait until the signal becomes a space.
(5) FG
This is a Frame Ground signal.
(5) GND
This is a common ground on the circuit.
Busy is also issued at the time of power -on, test print, on-line, and reset.
When a framing error, overrun error, or parity error occurs, that
(Depends on DIP switch selection.)
If written at the time of Busy, an overrun
The data can be written in the input buffer even during
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iDP-460 User's Manual
The ERROR lamp is
Note that if this signal is a mark
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