7.2.49 998 – BITMAP GRAPHIC CACHE
R998aaaaaaaa => 0?0998aaaaaaaad…
Where:
aaaaaaaa = 8 character hexadecimal cache offset start value.
Cache size = 16MB, Cache offset values = 0x00000000 - 0x00ffffff
Two pixels per cache byte.
Note: Graphics Cache is in volatile memory. On power cycle, entire Graphics Cache will be
populated with 0’s (spaces) for pixel data. Use R998 command to verify cache has not been cleared.
Note: Graphics Cache memory is also used for temporary storage of uploaded firmware images
before writing into flash memory. Do not use the R998, W998 or T<esc>h (Display Graphic Cache)
commands while uploading or flashing new firmware.
d… = 64 (characters) 0x20 + pixel color palette index values,
See T<esc>e (Draw Display Graphic) command for more details on pixel data.
W998aaaaaaaad… => 998
Where:
aaaaaaaa = 8 character hexadecimal cache offset start value.
See R998 command for more details on cache offset.
d… = even number of (characters) 0x20 + pixel color palette index values,
See T<esc>e (Draw Display Graphic) command for more details on pixel data.
Modbus:
Supported through Modbus Extended Services Registers.
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