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Table 6.1 RS-232-C
Signal
name
1
Data Set
-3 v
-3 v
interface signal lines - IZontinued
Direction
transmit data (data modr!).
1, the printer ignores data on the Receive Data
Data on the RD line can be validated regardless
of this signal state.
It is 1 when the host ir; in test mode (e.g.,
during local loopback
operator panel.
1. DTR Constant Cm mode
If power is turned on and no en-or occurs in
the printer,
and is ready to start: (ready to print the datz
received from the hoa).
starts, this signal i.s not set to 1.
the printer, this si(pnal is not set to 0 and
the printer is nor rsady
state occurs, this
the printer can be ready to start by
correcting the cause of the error and pressing
the START/STOP
2. Drop DTR Start/Stop mode
riming:
This signal is set tc~ 1 with the following
Notes:
printing data received from the host or is
ready to print (it is: not actually printing
Functions
when the
test).
the
printer sets this signal to (
If power is turned on and an error occurs in
signal
switch.
timing:
if the interface buffer is empty.)
does not operate as described above. For
details, see Section 6.4.3.
this signal is
host is in data mode.
operates as follows:
If this
to start.
can be set to D and
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