Printer Status - Epson TM-L90 Developer's Manual

Confidential

Printer Status

To get the printer status, the following commands are available.
ASB (Auto Status Back)
Real time status
Status
For reference, differences between those 3 states kinds are :
• ASB :
When processed as a normal command, the printer automatically transmits a status
message whenever the status changes. It is always necessary to check the ASB status.
• Real time status:
When the printer receives this command, it responds with the specified printer status.
Reporting the printer status takes priority over any normal print data. The printer also
stores the code string of the command in the receive buffer as a part of the bit-image
data.
• Status:
The printer transmits a specified printer status in the same way that it processes normal
print data.
4-6 Application Development Information
Printer status
GS a
DLE EOT
GS r
Rev. A