Automation, Control & Plant Intelligence News Updates
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September, 2006
Exele Releases New Version of OPCcalc, OPC Calculation Engine
Exele Releases New Version of OPCcalc, OPC Calculation Engine
OPCcalc 3.1.6 released
New features include Web queries, tag abbreviations, and NaN support
OPCcalc allows you to easily create process calculations that use OPC tags as inputs to equations and outputs of results. Based on Microsoft Visual Basic.Net, OPCcalc handles all of the "plumbing" for your equations, letting you concentrate on your calculation logic.
Trusted around the globe by some of the world's largest process companies, OPCcalc brings unmatched performance and features to OPC-based calculations.
OPCcalc 3.1.6 new features include...
Ability to query HTML web page data for use in your calculations
Retrieve numeric and string information from web pages for use in your calculations
Equation Editor Tag List displays all tags and values in the current library
Updating tag list allows you to quickly view the current value, quality and timestamp of all tags used in your equations
Abbreviations for long tag names
Tag prefixes allow you to abbreviate common tag name prefixes
Advanced information regarding equation logic errors available to running equations
In the case of logic run-time errors (e.g. divide by zero exceptions), equation can retrieve detailed information regarding the error and description. This information can be used as part of the equation logic and/or logged to the OPCcalc daily log file.
Configurable behavior when reading numeric tag values with NaN (not-a-number) values
If OPCcalc equations read tag values containing NaN values, these values can be replaced with a good numeric value and user-chosen quality. (NaN values used in equations may cause unintended logic errors)
Configurable equation output if attempted NaN output (example: result of divide-by-zero)
In the case NaN values assigned to output tags, OPCcalc can replace the NaN value with a good numeric value and user-chosen quality
Equation Editor and Scheduler performance enhancements for improved user interaction
