Omega Vehicle Security OMB-NETSCAN 1500 Manual de usuario Pagina 215

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Appendix C Configuration Aspects for Programmers
NetScan Users Manual C-19
This response indicates that the first available scan is -0000076, which is a pre-trigger scan. This scan can be
retrieved as follows:
PRINT#1,R1X Get the -0000076 scan
LINE INPUT#1,A$ Get the scan
PRINT A$ Screen shows (4 channels configured)
+1234.50-0234.20+0984.00+0323.30
PRINT#1,U6X Now get status of current read trigger block
LINE INPUT#1,A$ Get the response
PRINT A$ Screen shows
000001,001233,-0000075,12:34:54.200,03/23/97,00000767,12:54:12.900,03/24/97,00001156,01
Notice that the current read pointer has now advanced to pre-trigger location -000075 and that the total scan
count has been decremented to 001233.
To retrieve data after a trigger event has occurred, the NetScan provides multiple query functions. The R
command can be used to read the last scan in the data buffer (R1), the last block in the data buffer (R2) or all the
data available (R3). The U6 command will query the current trigger block for a variety of information, such as
the trigger block number, current scan in block, the scan number that trigger occurred, etc. See the U command
description in the Command Reference section for details.
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