Epson 100-88002 - page 180

Control Codes
Page 168 100-88002 Rev B
[ENQ] <21> Inquire printer ID
ASCII [ENQ] <21>
Hexadecimal 05H 15H
Decimal <5> <21>
Function The [ENQ] <21> command returns the printer IEEE 1284 ID string.
Response [ACK] <21> <n> {ID string}
Where:
<21> is the echo of the command ID and <n> is the number of return bytes in
the ID string {ID string} is the IEEE ID return string, which follows:
MFG:TransAct.;
CMD:M880CL,IPCL;
CLS:PRINTER;
MDL:M880 PcOS;
DES:EPIC 880TM;
REV:PE8800-01.00
OPTS:$63xy
Where x is a bit field defined as follows:
bit 0 = 1 Red support
bit 1 = 1 Green support
bit 2 = 1 Blue support
bit 3 = Always 0
bit 4 = Always 1
bit 5 = Always 1
bit 6 = Always 0
bit 7 = Always 0
The y is a bit field defined as follows:
bit 0 = 0
bit 1 = Knife is installed.
bit 2 = 0
bit 3 = Always 0
bit 4 = Always 1
bit 5 = Always 1
bit 6 = Always 0
bit 7 = Always 0