Knowledge Base

This program first collects names and branches of register variables to treat from a text file in the TP folder. The script will then create events on the thresholds of those register variables, activating an alarm using a timer every time the threshold is crossed for a specified amount of time. The alarm will not be triggered if the register variable returns below the user-set hysteresis of that variable before the delay period expires.

This system is intended to be used with projects that often encounter short spikes in the equipment readings as well as readings that may hover around a threshold value; the goal being to avoid alarms being recorded as being turned on and off too frequently.

The workaround here allows each threshold to have its own hysteresis value that can be set by the user in real time, provided the necessary variables have been created according to a particular naming scheme, which is visible inside the program files.

When running the sample project, click the “Load Config” button on the mimic before running any tests with the mimic’s controls. This will call the program to create the functional events on the thresholds.

See the comments of the program files for exact explanations on its function.

Sample project:

[AlarmDelay_Sample.zip]

Download attachments: ThresholdHysteresis_Sample.zip