Citizen Systems iDP3240 - Manual (Page 186)

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14. APPENDIX 3. IDENTIFICATION OF SEND STATUS
Because the status sent from the printer has certain fixed bits, it is possible to
identify to which command the status belongs.
When using ASB (Automatic Status Back), however, the first byte of ASB should be
checked, and then the three consecutive bytes except for XOFF should be treated
as ASB data.
Identification of Send Status
Command and function Status
GS I <0
∗∗
0
∗∗∗∗
>B
GS r <0
∗∗
0
∗∗∗∗
>B
XON <00010001>B
XOFF <00010011>B
DLE EOT <0
∗∗
1
∗∗
10>B
ASB (1st byte) <0
∗∗
1
∗∗
00>B
ASB (2nd - 4th bytes) <0
∗∗
0
∗∗∗∗
>B