Script Tags provide a highly configurable way to define calculation and event raising tags.

Script tags can be written in:

• C#
• FLEE (Fast Lightweight Expression Evaluation) - more info
• Javascript

Script Tag Templates are pre-configured to perform a specific function.

The following templates exist:

• Average Calculator
  Periodically calculates the average value of a process tag.

• Delta Calculator
  Calculates the delta between the value of two input tags.

• GasVelocityCalculator
  Calculates gas velocity using flow rate and pressure.

• Bad Data Detection
  Data quality check that raises alert if monitored tag returns NaN or has a 'bad' status.

• Channel Deviation Detection
  Checks for deviation in output from a sensor with two data channels. An alert indicates that one or both of the channels is unreliable. The method is to regularly compare Channel A and Channel B and check if difference is within acceptable instrument error tolerance. Default configuration is to check 24hr average difference 4 times per day.

• Flatline Detection
  Script tag that checks for flatlining data (i.e. process tags where the tag may be updating regularly, but the sensor value is not changing).

• Frozen Signal Detection
  Script tag that periodically ensures that newer values are being received for a tag.

• Equipment Running Status Monitor
  Monitors the running status of a piece of equipment and triggers and resets events when the status changes.

• Fleeting Excursion Monitor
  Script tag template for monitoring sensors such as acoustic sand probes that can generate fleeting excursions.

• Limit Monitor \\Script tag that periodically monitors a process tag value against a limit using MIN/MAX aggregated data.
  Use the FleetingExcursionMonitor template if you require a high degree of accuracy.

* Time Based Delta Monitor
Monitors the rate of change of a process tag over a time period.

“Monitor that periodically ensures that newer values are being received for a tag.

Alerts if no new value is received for 24hr period. ” Bad Data Detection Script tag template that performs a data quality check. Alerts if a script tag returns NaN or has a 'bad' status. Control granularity and frequency of checks by varying schedule and sample-period for average data-points.

Flatline Detection “Script tag template that checks for flatlining data (i.e. process tags where the tag may be updating regularly, but the sensor value is not changing).

Alert if value doesn't change in 24hr period. ” Channel Deviation Script tag template that checks for deviation in output from a sensor with two data channels. An alert indicates that one or both of the channels is unreliable. The method is to regularly compare Channel A and Channel B and check if difference is within acceptable instrument error tolerance. We use a 24hr average as channels may not relay on precisely the same time Default configuration is to check 24hr average difference 4 times per day.

Ad-hoc script tags can perform bespoke calcutations and actions. Use either c# or FLEE script to define.

A user interface exists on App Store Connect to administer script tags. However, for operations of scale (where many tags are required) or security (where access to app store connect server is restricted) it may be necessary to prepare configuration files for upload.