Omega Vehicle Security OMP-MODL manual 11-111

11.. . APPENDIX C: HYPERWARE FILE LISTING

Tank Level / Inventory Profiling Data Collection with Alarming:

A remote site liquid tank has a constantly varying inventory as liquid is added and removed over time. Profiling of the inventory over time, onsite display of the inventory amount, and overflow telephone pager alarming are all desired.

Using a single 4-20mA pressure transmitter input and a Math icon, the inventory can be calculated in gallons. The pressure transmitter is powered from a battery which is cycled ON 10 seconds prior to reading, then OFF with the Relay icon and the Warmup icon.

Every 30 minutes, the inventory is logged to memory as well as compared (Comparator icon) to four different thresholds, 100, 200, 300, and 400 thousand gallons. The current level is displayed on the OMP-MODL front panel LCD.

In the event that the top threshold (full) is met, a Page is sent with a code of `111’.

Additionally, every minute, a float type level switch is read via the GPDI icon in the Event mode. When the tank gets too close to overflowing, the switch closes. This signal is then sent to the Pager icon and a Page of `999’ is sent.

A separate Program Net branch is added to initiate a Page of `222’ if the OMP- MODL memory fills or a Run-time error occurs.

USING THE OMP-MODL 11-111