Omega Vehicle Security 1400 User Manual

Configuration Aspects for Programmers

B-6

ChartScan User’s Manual

ChartScan does not scan channels on its initial power-up.  Even though most user-set configuration states have
associated defaults, you must configure a few items before scanning begins.

For ChartScan to begin scanning, the controlling computer must perform two operations:  (1) Configure each
channel, and (2) select the channels that are to be included in the scan.  These operations are illustrated in the
following figure.

After completing these two operations, the alarms and the High/Low/Last Registers are updated at the maximum
possible scan rate.  However, the scans are not being placed in the Acquisition Buffer at this time.

Inspecting the unit’s High/Low/Last Registers shows the temperature (or voltage) values of the configured
channels.

To begin storing scans in the unit’s Acquisition Buffer at a programmed scan rate, it is necessary to complete the
following four steps:

1.  Configure each channel with the desired type.
2.  Select the scan intervals.
3.  Select the acquisition parameters.
4.  Select the trigger parameters.

Once the steps have been completed, ChartScan is armed and waiting for the trigger.  Once the trigger is
satisfied, ChartScan begins collecting scans and storing them in the Acquisition Buffer.

Reference Note: If you are not familiar with programming you will probably gain more
understanding of the program-related portions of this appendix by first reviewing
Appendix A, API Command and Appendix D, ChartScan Program Examples.