VBScript Reference Manual for InduSoft Web Studio - ICP DAS

InduSoft Web StudioVBScript Reference ManualVBScript Configuration and Operation in IWSIWS acts as the host application for the Microsoft VBScript Engine. This means that to write VBScript,you need to be in the IWS development (engineering) environment. It is important to note that there isno one central location where a VBScript interface is located inside an IWS application. The location ofthe VBScript interface (where the VBScript code gets placed) depends on the function the VBScriptcode is to perform and the scope of access to its Procedures and Variables. InduSoft has implementVBScript in this manner to simplify its use, and to be consistent with the IWS architecture as well ascurrent licensing methods.VBScript is interpreted code. While it executes fairly efficiently, it is nevertheless interpreted and willnever execute as efficiently as compiled code. This should not present any concern for HMI/SCADAapplications since IWS is performing the real-time management of the tag database and key functionssuch as alarming, logging, etc. The interpreted nature of VBScript allows changes to be made quickly toan application. IWS supports dynamic, on-line configuration and this capability is maintained with theaddition of VBScript supportDevelopers familiar with IWS know that in the bottom left corner of the development window are tabsthat provide access to the Database, Graphics, Tasks, and Communications Workspace folderscontaining the different application components. The developer will need to navigate among thesedifferent folders and application components when using VBScript.VBScript interfaces can be found in 6 different areas:• Database Workspace folder – Global Procedures• Graphics Workspace folder - Graphics Script• Graphic Screens – Screen Scripts• IWS Objects on a Screen – Command Dynamic• ActiveX Objects on a screen – ActiveX Events• Tasks Workspace folder – Background Startup Script and Background Script GroupsSubfolders and Iconswithin a WorkspacefoldersTabs to access variousWorkspace foldersInduSoft, Ltd. 43