A2-1.
It is the specification that for performing sending data to excel, when
the number of the sent data reached 65536 points, data transfer will be
continued with switching to the next sheet automatically.
When the sheet does not exist, a new sheet will be made automatically and
data transfer will be continued.
Therefore, the points of the data can be sent is: the number of sheets
can be made ×65536.
The maximum number of sheets can be made depends on the size of the memory
used by excel.
A2-2.
Please confirm the version of Excel. Please refer to the specifications
for the supported EXCEL version.
A2-3.
The sampling clock period is so fast that it is not enough for sending
data to Excel. Please slow down the sampling clock period.