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7. AUXILIARY FUNCTION
5) When the reading of sampled data is not finished in time
When the next page number of the sampling completion page number matches the sampling read
page number during the sampling (SMPO: ON), the position board judges that the reading of
sampled data is not finished in time and the sampling is finished (the sampling error (SMPE) turns
on). After confirming the sampling is being performed (SMPO) turns off, read the unread pages to the
page of the read sampled data completion page number and valid read sampled points. The valid
data points sampled in the page of the sampling completion page number are stored in the valid
sampled read points.
Start sampling command
(SMPS)
Sampling is being performed
(SMPO)
Sampling is complete
(SMPF)
Sampling error (SMPE)
Sampling completion page
number
Sampling read page number
Read sampled data
completion page number
Read processing of sample
data from read area
(user program)
Reading 64
th
page Reading 65
th
page
ON
OFF
ON
OFF
ON
OFF
ON
OFF
62
63
64
65
64
-1
65
Sampling is stopped
because user program read 64
th
page.
User program read the rest of
65
th
to 256
th
page, 1
st
to 63
rd
page.
POINT
In the timing chart above, since the sampling is stopped when the sampling of
the 63
rd
page is completed, the valid sampled data of the 63
rd
page (valid
read sampled points) is 32 points.
When sample data that is read is 0 for points outside of sample valid points.