Citizen PPU-231II Command Reference Manual page 97

[Caution]
[Reference]
• Because frequent writing in the non-volatile memory can
destroy the memory, the writing command (FS g3) should be
used less than 10 times a day.
• It may happen that the printer becomes BUSY during the
process of writing data into the non-volatile memory while
this command is executed. When the printer becomes BUSY,
it will stop receiving data. Therefore, sending data from the
host (Including real time commands) is prohibited.
FS g4
— 95 —