Epson TM-J2000 Specifications Page 314

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CONFIDENTIAL
Paper roll Status commands GS a
Ver. 10.05 p. 314
printer has to store ASB status changes to be transmitted, the following 2 sets (8 bytes) of ASB status are
changed to special data and transmitted prior to other transmission data when the host enters Reverse
Mode:
ASB-1: Status information that shows whether status changes occurred
ASB-2: The latest ASB status information
If bits have a different value between (ASB-1) and (ASB-2), this means at least one change has occurred.
An example is shown below:
Bit 5 and 3 of the first byte are different from (ASB-1) and (ASB-2). From this information, you can see
that [The cover is shutting now and On line though Off line (Bit 3) by cover opening Bit5)].
Basic ASB status can be differentiated by other transmission data by Bit 0, 1, 4, and 7 of the first byte.
Process the transmitted data from the printer as ASB status which is consecutive 3 byte if it is "0xx1xx00"
[x = 0 or 1]. However, the processing shown in the following is necessary in the identifying processing of
ASB status.
When the host communicates with the printer by XON/XOFF control, 4 bytes of data may interrupt ASB
status; therefore, 4-byte code except for the XOFF code, is processed as ASB status. ASB status
configuration is different from that of the XOFF code.
[Model-dependent variations] TM-J2000/J2100, TM-T90, TM-T88IV, TM-T70, TM-L90, TM-P60, TM-U230,
TM-U220
First byte Second byte Third byte Fourth byte
ASB-1 0011 1000 0000 0000 0110 0011 0000 1111
ASB-2 0001 0000 0000 0000 0110 0011 0000 1111
Program Example for all printers
PRINT #1, CHR$(&H1D);"a";CHR$(4); Enable "Error" status
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