June 26, 2006 - OPCcalc allows you to easily create complex process calculations which 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.OPCcalc uses Visual Basic .Net "under-the-hood" to create calculation executables.
Microsoft recently made Visual Basic 2005 Express Edition free; OPCcalc now supports Visual Basic 2005 Express Edition Programmers and non-programmers can easily use our Equation Editor to define the logic and arithmetic needed for their equations. OPCcalc will then build 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. Our Equation Scheduler allows you to configure, start, stop and monitor your equations.
OPCcalc now supports:
• Visual Basic .Net 2003 (v7.1) • Visual Basic 2005 Standard or later • Visual Basic 2005 Express (free)
Requirements:
• Windows 2000 or later • Visual Basic.Net 2003 or 2005 (VB Express 2005 is now supported) • OPC DA Server (supporting Data Access version 2 or later) • OPC HDA Server, optional (supporting Historical Data Access version 1.1) OPCcalc can communicate with OPC DA and HDA Servers located locally or across the network. If your OPC Server supports DA, you can retrieve and output current values. If your OPC Server supports DA and HDA, you can retrieve and output current and historical values.
If your OPC HDA Server supports aggregates (average, min, max), OPCcalc has a set of built-in functions for retrieving these values directly into your calculations.
