Titan Electronics Inc NETCOM423 Manuel D’Utilisation
823RM WLAN, 1623RM WLAN
Page
98
8.2.2. P
RINTER
R
ESET
Before a new job is sent to the printer, this printer should be in a well
known state. On a parallel printer port this is easy to achieve. There is a
defined signal to send a »reset« command to the printer.
Such a definition is not available for serial printers. Instead there is a
reset command, which users may send via the serial line. Typically this
command is specific to the manufacturer or even to the printer model.
So the NetCom allows to specify this command by entering an
“InitString” for each queue.
8.2.2.1.
known state. On a parallel printer port this is easy to achieve. There is a
defined signal to send a »reset« command to the printer.
Such a definition is not available for serial printers. Instead there is a
reset command, which users may send via the serial line. Typically this
command is specific to the manufacturer or even to the printer model.
So the NetCom allows to specify this command by entering an
“InitString” for each queue.
8.2.2.1.
Init String Definition
The Initialisation of the printer typically involves ASCII control codes,
ordinary ASCII characters and some binary data. On some models it
may also be necessary to provide a certain state of the modem control
signals RTS and DTR, applied with special timing. The “InitString” in
the NetCom Device Serves offer all these options.
ordinary ASCII characters and some binary data. On some models it
may also be necessary to provide a certain state of the modem control
signals RTS and DTR, applied with special timing. The “InitString” in
the NetCom Device Serves offer all these options.
8.2.2.1.1. ASCII
Text
Ordinary ASCII characters are entered as they are on the keyboard. The
single exception is the ‘Less Than’ character ‘<’, which is used for
other special functions.
single exception is the ‘Less Than’ character ‘<’, which is used for
other special functions.
8.2.2.1.2. ASCII
Control
Codes
ASCII control codes are entered by their standard name, enclosed in
‘Angle Brackets’, i.e. in ‘<’ and ‘>’ (Greater Than). Some examples of
this are <ESC>, <CR> or <TAB>.
‘Angle Brackets’, i.e. in ‘<’ and ‘>’ (Greater Than). Some examples of
this are <ESC>, <CR> or <TAB>.
8.2.2.1.3. Numeric
Codes
Especially binary data must be send by means of its numeric value.
Since the ‘<’ ASCII character has a special function, the only way to
use this is the numeric method. This also applies to printable characters
of some Extended ASCII character sets.
The NetCom accept the decimal value, also enclosed in angle brackets.
Up to three decimal digits define the character to send to the printer.
The ‘<’ is used as <60>, while the <ESC> may also sent as <027>. The
‘>’ may be used directly, however for clarity <62> should be preferred.
Since the ‘<’ ASCII character has a special function, the only way to
use this is the numeric method. This also applies to printable characters
of some Extended ASCII character sets.
The NetCom accept the decimal value, also enclosed in angle brackets.
Up to three decimal digits define the character to send to the printer.
The ‘<’ is used as <60>, while the <ESC> may also sent as <027>. The
‘>’ may be used directly, however for clarity <62> should be preferred.
8.2.2.1.4.
Modem Control Signals
Via the “InitString” control of RTS and DTR is available. This manual
does not make statements about voltage levels on the signals, these are
just set to an active or inactive state. <RTS+> and <RTS-> activate and
deactivate the RTS signal, while <DTR+> and <DTR-> do the same for
DTR.
does not make statements about voltage levels on the signals, these are
just set to an active or inactive state. <RTS+> and <RTS-> activate and
deactivate the RTS signal, while <DTR+> and <DTR-> do the same for
DTR.