Toshiba B-EP Series Interface Specification page 534

8.9 EXCEPTION HANDLING
8.9.1 UNDEFINED CODE
This applies to the codes that fall in the range between 00h and 1Fh in the character code table.
If a code that is not defined in the range is inputted as a command, 1 byte must be discarded, and
the subsequent data must be processed as normal data.
<Ex.> Data string [30H][31H][03H][32H][0AH][33H] is inputted.
[30H] [31H] [03H] [32H] [0AH] [33H]
Data string actually processed
[30H] [31H] [32H] [0AH] [33H]
8.9.2 UNDEFINED COMMAND
If a code following the [ESC] (1Bh), [FS] (1Ch), or [GS] (1Dh) is not defined as a command, [ESC],
[FS], or [GS] and the following code (2 bytes in total) must be discarded.
<Ex.> Data string [30H][1BH][22H][31H][32H] is inputted.
[30H] [1BH] [22H] [31H] [32H]
Data string actually processed
[30H] [31H] [32H]
8.9.3 SETTING OUT OF DEFINED RANGE
If a numeric value outside the defined range is inputted, the command must be ignored, and an
already set value must not be changed. For commands that have multiple arguments, once a
numeric value out of the defined range is inputted, command processing is aborted, and the
subsequent data is processed as normal data.
<Ex.> Data string [1BH][2DH][05H] is inputted.
[1BH] [2DH] [05H]
Data string actually processed
[05H] is out of the defined range. Therefore, the data string must be discarded. The
already set underline remains unchanged.
CHAPTER 8 ESC/POS MODE (INTERFACE COMMANDS)
Code defined as the [LF] command
Discarded as an undefined code
Discarded as an undefined code
Out of the defined range
Defined as the Underline Set command ([ESC]-)
8-7
B-EP Series