
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
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
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
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