Star Micronics Line Thermal Printer - Manual (Page 18)

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STAR Line Mode Command Specifications 3-2
3.2. Exception Processing
1) Undefined codes
Codes from <00>H to <1F>H are targeted. When codes not defined as commands in this region are received, they
are discarded.
(Ex.) If processing the data string of <30>H<31>H<03>H<32>H<0A>H<33>H, the printer will discard <03>H as an
undefined code.
2) Undefined commands
When data continuing the codes of ESC, FS, GS, DLE are codes not defined as commands, ESC, FS,GS and
subsequent codes are discarded.
(Ex.) If processing the data string of <30>H<1B>H<22>H<31>H<32>H, the printer will read and discard
<1B>H<22>H as an undefined command.
3) Settings outside of the defined area
Processing values outside of the defined area in commands accompanying arguments, those commands are
ignored and the preset values are unchanged. The processing of commands is terminated at the point values
outside of the defined region are processed in arguments having a plurality of commands. Data after that is
processed as normal data.
(Ex.) If processing the data string of <1B>H<52>H<15>H, the printer will discard the data string of
<1B>H<52>H<15>H because although <1B>H<52>H is defined as a commands (ESC R), the argument
<15>H is outside of the definition. Therefore, the international character set that is already set experiences
no change.