Citizen Systems PPU-231II - Manual (Page 104)

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[Caution] • Because frequent writing in the non-volatile memory can
destroy the memory, the writing command should be used
less than 10 times a day.
• Just after the completion of the writing operation into the non-
volatile memory, the printer hardware will be reset. Therefore,
download characters, download bit images, and macro
definition will be made undefined. The receiving buffer/printer
buffer will be cleared, and each setting will go back to its default
value. Then the status of dip switches will be checked once
more.
• It may happen that the printer becomes BUSY during the
process of writing data into the non-volatile memory in the
execution of this command. When the printer becomes BUSY,
it will stop receiving data. Therefore, sending data from the
host (Including real time command) is prohibited.
[Related Commands] FS p
(yL + yH
Ч
256)
Ч
8dots = 768dots
(xL + xH
Ч
256)
Ч
8dots = 512dots
[Example] When xL =64, xH = 0, yL = 96, yH = 0