Epson TM-T20 Technical Reference Manual page 54

End the user setting mode session
Set values for the memory switch
Transmit the setting of the memory switch
Set the customized setting values
Transmit the customized setting values
Set conditions for USB interface communication
Transmit conditions for USB interface communication
Write to NV user memory
Read from NV user memory
Commands for sub-functions
Initialize printer
Transmit printer ID
Set horizontal and vertical motion units
Select peripheral device
Generate pulse
Generate pulse in real-time
Execute power-off sequence
Control buzzer (optional external buzzer)
Clear buffer(s)
Enable/disable real-time command
Send real-time request to printer
Select page mode
Select standard mode
Set the process ID response
Execute test print
Select the print speed
Start/end macro definition
Execute macro
Initialize maintenance counter
Transmit maintenance counter
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