HP PCL/PJL reference - Printer Job Language Technical Reference Manual

D-6 PJL Status Codes EN
Background Paper Tray Status (12xyy)
Background paper tray status messages occur when a tray is open or
a tray is lifting. Background paper tray status messages are in the
format 12xyy. The following tables list the x and y values for these
messages. For example, 12301 indicates the lower cassette tray is
open.
X = Tray Code Tray
0 MP Tray or Multi-Purpose Tray1
1 Manual Feed
2 PC Tray or Upper Cassette or Universal
Tray 2
3 LC Tray or Lower Cassette or Universal
Tray 3
4 EE Tray or Envelope Feeder
5 Any HCI Tray
YY = Status Code Tray Status
01 Tray Open
02 Tray Lifting