Stand: 28.2.2002
Gedruckt: 06.02.2007
Stand: 28.2.2002
Gedruckt: 06.02.2007
Stand: 28.2.2002
Gedruckt: 06.02.2007
Stand: 28.2.2002
Gedruckt: 06.02.2007
2 4
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4.2.2 Descript ions of Commands
4.2.2.1 STATUS commands
All transmissi on of status in IEEE-1284 mode is disabled at power on.
Status transmissi on must be enabled by the US S +n command before
any STATUS transmissi on will occur in I-EEE-1284 mode.
In case of an ERROR as defined in the table below, the printer
transmits DLE E and the 2 status bytes. The response to a STATUS
REQUEST is to transmit DLE (10 hex) followed by a SOURCE byte that
distingui shes what type of status is being transmitte d followed by the
two status bytes as defined in the table below.
The SOURCE byte is defined as:
A = Auto Status Back
. Is disabled by default but is enabled when the printer receives the DLE A +n1
+n2 command . +n1 and +n2 define a mask using the same byte/bit structure as in the table below. A "1"
in a bit position enables the automatic transmissi on of DLE A and the 2 status bytes when an enabled
condition occurs. The bit positions marked as errors in the table will always cause the automatic
transmissi on of DLE E and the 2 status bytes so these positions will usually be "0" in the user defined
mask.
B = Buffered status
. DLE B and the 2 status bytes are transmitte d when the DLE B command is
processed out of the input buffer.
R = Real Time Status
. If enabled by US R +n command , DLE R and the 2 status bytes are transmitte d
immedia tely when the DLE R command is received by the printer.
U = not a true STATUS request
. When DLE U +n1 +n2 is processed out of the receive buffer, the
printer transmits DLE U +n1 +n2 back to the host. The user can send DLE U +n1 +n2 anywhere within a
document if he needs to know that the printer has processed the document up to that point.
Table 6 - Printer's response to a STATUS REQUEST command