The VB runtime is/was a separate library containing various functions to use in you VB applications. This runtime could be installed (copied) in you Windows directory, where it could be used by every VB application that was written in the same version (VB5 runtime is not compatible with VB6 runtime).
.NET builds on a similar principle, although it is so much larger, you can hardly compare it. But the .NET framework also contains a lot of basic functionality that can be used by all .NET applications.
Visual Basic .NET enables you to code using VB 6 legacy syntax and keywords. For example, we can use CInt, Mid, InStr etc. The implementation of the compatibility layer is at the Microsoft.VisualBasic.dll library. [ ]
First released in 1991, Microsoft Visual Basic was a programming environment where one could build an application by visually creating the user interface first, and then adding code. In contrast, even the smallest Visual Basic basic programs could take reams of program code to write in C or C++. Visual Basic was extremely popular for business application programming. The language itself was an interpreted BASIC dialect, however speed was maintained through the use of reusable compiled libraries (DLLs and VBX controls). These however, limited application development to Microsoft Windows.
Visual Basic 3 was the most popular version under 16-bit Windows 3.1, while Visual Basic 6 was the most popular for 32-bit Windows 95/NT and later. After version 6, Visual Basic was replaced by Visual Basic .NET, an incompatible successor.
Microsoft Visual Basic 3.0 was the most popular version for Windows 3.x development. It is the last to create executables that do not require complex installation, with small runtimes, and minimal memory usage. The professional version includes Crystal Reports, and a setup generation wizard. Many third party controls were developed for VB 3. This is also the last version compatible with Windows 3.0.
VDS's graphic windows run on VDS Viewer (Java application), so just a personal computer and no special dedicated software can be used to access VDS running on site and grasp the site statuses and perform operations and monitoring anytime, anywhere.
Each client computer used to access VDS and perform operations is a thin client requiring no special dedicated software. The man-hours and cost needed for updating the operating system and dedicated software are thus greatly reduced, and the cost for purchase of HMIs is also cut because there's no need for special computers for process operations.
VDS can easily link a variety of equipment including FCN and FCJ autonomous controllers, various suppliers' programmable logic controllers, temperature controllers, and power monitors, on an integrated network. Whether for factory or process automation equipment, VDS can handle various applications for production lines and manufacturing processes.
VDS's security functions can restrict access to writing data, running a program, and so on, to protect the system against unauthorized users. VDS also records a log of the actions taken at the system as a detailed audit trail. Even when accessing an on-site system via a VDS Viewer, users must enter their user name and password for authentication.
Process alarms and user-defined messages can be viewed on the alarm summary display and announced using sound output in different ways depending on their importance, making them easy for operators to identify. These messages can be analyzed later on the historical message file and on a printout.
A trend graph of acquired and saved data can be pasted to a desired position on a graphic window so that the progression of data over time can be grasped. Trend data saved in VDS can also be exported to a CSV format file for preparing reports and in-depth analyses.
Functions for managing alarms and messages, which are crucial in equipment and process operation, and process management functions to run and quit various programs, can be developed effortlessly using standard tools. There is no need to develop management programs using Visual Basic or other programming languages.
Object-oriented engineering tools for all engineering tasks from defining I/O device connections and data acquisition specifications up to creation of graphic windows make application development that much more efficient.
Defining connections to I/O devices:
Simply select a proper driver for each I/O device to be connected and make basic communication settings such as an IP address. There's no need to write a troublesome communication program.
Defining data for operation and monitoring:
Simply define tags called control objects, set the method of acquiring their data (periodically, one-shot, etc.), and make auxiliary settings such as the scaling specifications. Control objects you defined can be grouped for reuse.
VDS basic software is available in two versions. The full-time version has both development and runtime environments; the runtime version offers only the runtime environment. Use of the runtime version allows a cost-efficient system to be built.
The Report Package, Trend Package, Test Package, and Multi-task Package are individually available in two versions: full-time and runtime versions. Use of the runtime version allows a cost-efficient system to be built. For further details, please send the information requests to us.
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