Calculation software gets to grips with OPC
An
Exele product story
Edited by the Engineeringtalk editorial team
Jan 5, 2006
OPCcalc allows users to easily create complex calculations which use OPC tags as inputs to equations and outputs of results.
OPCcalc allows users to easily create complex calculations which use OPC tags as inputs to equations and outputs of results.
Based on Microsoft Visual Basic.Net, OPCcalc handles all the "plumbing" for equations, letting systems designers concentrate on their calculation logic.
Programmers and nonprogrammers can easily use the equation editor to define the logic and arithmetic needed for their equations.
OPCcalc will then create a compiled Microsoft Visual Basic.NET program which contains the necessary OPC calls, scheduling, and error handling required to execute your equations on a configured interval, outputting the results to other OPC tags.
Each equation library contains one or more equations (outputs) and can communicate with tags on multiple OPC servers.
The equation scheduler allows users to configure, start, stop and monitor their equations.
OPCcalc can communicate with OPC DA and HDA servers located locally or across the network.
If the OPC server supports DA, users can retrieve and output current values.
If the OPC server supports DA and HDA, users can retrieve and output current and historical values.
If the OPC HDA server supports aggregates (average, min, max), OPCcalc has a set of built-in functions for retrieving these values directly into calculations.
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