Epson DLQ-3000 Service Manual page 40

DLQ-3000+
Y
Extensibility Request
The printer responds affirmatively when the extensibility request values are 00H or 04H,
as follows:
Y
00H Request nibble mode reverse channel transfer.
Y
04H Request device ID using nibble mode rev channel transfer
Y
Device ID
The printer sends following device ID string upon request:
[00H] [3DH]
MFG EPSON;
CMD ESCPL2, PRPXL24, BDC;
MDL DLQ-3000+;
CLS PRINTER;
1-32
Rev. A