Appendix C Configuration Aspects for Programmers
NetScan User’s Manual C-25
The R2 command will read the oldest available trigger block in the Acquisition Buffer. For instance, continuing
with the previous example:
PRINT#1,"U6X" ‘ Request the current status of the Acquisition Buffer
LINE INPUT #1,A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows...
0000006,0020215,-00000099,12:51:43.100,03/24/97,00000100,01:53:01.300,03/24/97,00000250,01
The above response indicates that there are 6 trigger blocks currently defined in the Acquisition Buffer and there
are 20215 total scans in the buffer. Furthermore, it shows that the current read pointer is at scan # -99 in the 1st
trigger block and that there are 350 scans in this trigger block. To retrieve that trigger block, perform the
following:
PRINT#1,"R2X" ‘ Request the oldest trigger block
LINE INPUT#1, A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows (4 channels x 350 scans) 1400 readings
+0234.20-0019.40+0001.40+0023.60....
PRINT#1,"U6X" ‘ Request the current status of the Acquisition Buffer
LINE INPUT#1, A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows...
0000005,0019865,-00000100,02:15:34.100,03/24/97,00000100,04:51:10.300,03/24/97,00000250,01
Notice that there are now only 5 trigger blocks in the buffer and that there are only 19,865 scans in the buffer.
Also note that the current read pointer is a t t he beginning of what was the next trigger block. That trigger b lock
is now the current trigger block.
The R3 command will read all available data within the Acquisition Buffer. For instance, continuing with the
previous example:
PRINT#1,"U6X" ‘ Request the current status of the Acquisition Buffer
LINE INPUT#1, A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows...
0000005,0019865,-00000100,02:15:34.100,03/24/97,00000100,04:51:10.300,03/24/97,00000250,01
The above response indicates that there are 5 trigger blocks currently defined in the Acquisition Buffer and there
are 19,865 total scans in the buffer. It also shows the current read pointer at the -100 scan in the 1st trigger
block and that their are 351 scans in this trigger block (101 + 250); i.e., 101 scans from -100 to 0, plus the 250
scans from 1 to 250. To retrieve all the scan data within the buffer:
PRINT#1,"R3X" ‘ Request all scan data in the buffer.
LINE INPUT#1, A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows (4 channels x 19865 scans) 79460 readings
+0234.20-0019.40+0001.40+0023.60....
PRINT#1,"U6X" ‘ Request the current status of the Acquisition Buffer
LINE INPUT#1, A$ ‘ Retrieve it.
PRINT A$ ‘ Screen shows...
0000000,0000000,-9999999,00:00:00.000,00/00/00,-0999999,00:00:00.000,00/00/00,-0999999,00
Notice that the Buffer Status String is null indicating that the Acquisition Buffer is completely empty.
For more information on using the R command refer to Appendix A.