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Status and Error Reporting for the LA75 Plus Companion Printer
4.3 Device Status Report (DSR)
4.3.1 Character Set Not Available
The character set not available code is sent if the device attempts to print from
a character set that has been addressed by Select Character Set (SCS), but is
not available in any print density, from any source. Sources include built-in,
cartridge, and downloaded fonts.
4.3.2 Downline Load Error
A downline load error is sent under any of the following conditions:
• The downloaded font file sent to the printer exceeds the printer’s download
capacity.
• The entire download sequence is ignored. See DECDLD (download font) in
the Command Dictionary.
• A DECDLD sequence is received, but the printer has been set to extended
input buffer size (no download capability) by the setup facility.
4.3.3 Alternate Protocol Error
The alternate protocol error code is sent by the printer if a user attempts to
select an alternate protocol that is not available in the printer.
4.3.4 Initialization Messages
Whenever the LA75 Plus Companion Printer completes a power-on sequence,
and the setup feature DEC 9 (Initialization Message) is enabled, an unsolicited
extended Device Status Report (DSR) is sent, reflecting the state of the LA75
Plus Companion Printer at this point. The parameter value of the initial brief
report is Device Ready (Ps = 0) or Device Not Ready (Ps = 3), as appropriate.
The first parameter value of the extended report uses the ‘‘First report since
initialization’’ value from Table 4–3. If any additional error conditions are
present, the parameter values for these errors are also reported.
Table 4–4 shows the possible initialization messages.
Table 4–4 Initialization Messages
Extended Report Meaning
ESC [ 0 n ESC [ ? 5 7 ; 2 0 n Printer just switched on, ready to print
ESC [ 0 n ESC [ ? 5 7 ; 2 0 ; 3 0 n Printer just switched on, ready to print,
ASF installed
ESC [ 3 n ESC [ ? 5 7 ; 2 7 n Printer just switched on, paper out
4–4 Status and Error Reporting for the LA75 Plus Companion Printer