User`s manual

7–89Digital Emulation
Device Status Requests (DSRs) (continued)
Printer Status Reports
The printer sends a Device Status Report (DSR) to the host via the serial line
when requested by the host (DSR) or when unsolicited reports have been
previously enabled and a reportable status condition has occurred. The host
can request a brief or extended status report, as follows:
NOTE: The question mark (?) character occurs only once per DSR
sequence.
• Brief, Unsolicited Messages Enabled:
Request Sequence Printer Response
n1 = 3 If a malfunction is detected
n1 = 0 After error condition has been corrected or
if no malfunction exists
CSI n1 n
• Extended, Unsolicited Messages Enabled:
Request Sequence Printer Response
CSI ? 2 0 n
CSI ? Pn ; ... Pn n
After error condition has
been corrected or if no
malfunction exists
Generic error code (See Table 7–18.)
Specific error code (See
Table 7–18.)
If a malfunction is detected
CSI 0 n
CSI 3 n
• Cursor Position Report: The unit of measurement can be character
cells, decipoints, or pixels. It is selected by using the Position Unit
Mode (PUM) and Select Size Unit (SSU) sequences.