Search Crosser Knowledge Base

New features in the AVEVA Historian Reader Module

We recently updated the AVEVA Historian Reader Module (version 1.1) with some exciting features:

  • Tags can now be defined through resource files. This makes it a lot easier to request a large number of tags from the Historian.
  • When using resource files you can also add custom metadata with each tag, to help with processing of the tag data in the Flow.
  • Support for different retrieval modes, as supported by the Historian. For example, you can use ‘Delta’ mode to only receive updates at a specified minimum time or value delta.
  • Support for custom filters.
  • Option to include ‘vValue’ data, in cases where there is non-numerical data associated with a tag.
  • Option to use either local time or UTC.

Check out the module documentation for more information and examples.

About the author

Goran Appelquist

Göran has 20 years experience in leading technology teams. He’s the lead architect of our end-to-end solution and is extremely focused in securing the lowest possible Total Cost of Ownership for our customers.

"Hidden Lifecycle (employee) cost can account for 5-10 times the purchase price of software. Our goal is to offer a solution that automates and removes most of the tasks that is costly over the lifecycle.

My career started in the academic world where I got a PhD in physics by researching large scale data acquisition systems for physics experiments, such as the LHC at CERN. After leaving academia I have been working in several tech startups in different management positions over the last 20 years.

In most of these positions I have stood with one foot in the R&D team and another in the product/business teams. My passion is learning new technologies, use it to develop innovative products and explain the solutions to end users, technical or non-technical."