HP PCL 5 Reference Manual page 356

"LOCTYPE=" identifies the location type of the currently selected font.
The value returned corresponds to the value field of the Set Status
Readback Type command.
"LOCUNIT=" identifies the location unit of the currently selected font.
The value returned corresponds to the value field of the Set Status
Readback Unit command.
For example, if the printer's currently selected font is a bold 14 point
Presentation bitmap font selected from a cartridge, and a font entity
request with the location type set to 1 is made, the response would
be returned as shown below.
For example, assume the printer's currently selected font is unbound
scalable Dom Casual font with the following characteristics:
If an entity request is made with the location type set to 1 (currently
selected), the following response is returned.
PCL
INFO FONTS
SELECT="<Esc>)8U<Esc>)s1p18.00v1s0b4148T<Esc>)78X"
LOCTYPE=4
LOCUNIT=1
16-14 Status Readback
For all fonts, if the font is a secondary font, then the "(" characters
are replaced by ")" characters in the "SELECT=" line.
PCL
INFO FONTS
SELECT="<Esc>(1U<Esc>(s0p10.00h14.0v0s3b11T
LOCTYPE=5
LOCUNIT=1
downloaded (font ID of 78)
temporary
Roman-8 (specified for printing)
secondary font
18 point
EN