User guide

DECSITF — Select Input Tray Failover
This command only affects sheets printed subsequent to the receipt of this
command. DECSITF cannot be used to clear a ‘‘paper out’’ condition. A
member of the composite tray need not be present when the command is
received, but must be present at the time of failover, or the device considers
the next tray in the composite tray definition.
When all of the paper trays in the composite tray definition are empty, a ‘‘paper
out’’ condition occurs. Printing resumes when any of the trays in the composite
tray definition are reloaded. If multiple trays are reloaded, the device resumes
printing from the same tray the last page was printed from.
Side Effects
When the printer receives a DECSITF sequence, it performs a conditional
sheet feed.
The Automatic Sheet Feeder Control (DECASFC) command and DECSITF
interact as follows:
• The device always attempts to print the first page after DECASFC (n) from
tray (n). If tray (n) is empty, the device checks the composite tray definition
for possible failover.
• DECSITF (a, b...) changes the composite tray definition. The device always
attempts to print the first page after DECSITF from tray (n) (established
by DECASFC). If tray n is empty at imaging time, the device checks the
new composite tray definition (a, b...) for failover possibilities.
• The device images all other pages from the same tray as the previous
page. If there is a paper out condition in that tray, the device checks the
composite tray definition (a, b...) for failover possibilities.
Error Handling
If an unsupported Ps1 is received, the command is ignored and a conditional
Sheet Feed is performed.
If a subsequent parameter is received that is not associated with an input tray,
or with an input tray that is not supported for failover, only that parameter is
ignored.
C–8 DEC PPL2 Command Dictionary Supplement