VBScript Reference Manual for InduSoft Web Studio

VBScript Reference Manual InduSoft Web Studio
• Variables declared in a Background Task Script Group have a local scope for its specific Script
Group only. Variables cannot be shared with other Script Groups, nor any other VBScript
Interface.
• Background Task Script Groups cannot declare their own Procedures (Subroutines and
Functions).
• The Execution Field of the Script Group will only support IWS tags or built-in functions. No
support for VBScript variables or Procedures is provided in the Execution Field.
However, the Background Task Script Groups can do the following:
• Access Procedures and Variables within the Background Task Startup Script.
• Access Procedures declared in Global Procedures.
To create a new Script Group, right-click on the Script
subfolder in the Tasks tab of the Workspace. Select the
Insert option from the pop-up menu. Note that the Startup
Script is already defined. To open (edit) an existing Script
Group, simply click its icon in the Script subfolder of the
Tasks workspace tab.
The code configured in each Script Group is executed by
the Background Task. IWS scans the Script Groups
sequentially (based on the number of the group) and
executes only the Groups in which the condition configured
in the Execution Field of the Script Group is set to or is
evaluated to be TRUE (a value different from 0).
When any Script Group is saved during runtime (e.g. from an on-line configuration download), the
Startup Script interface will be executed again, and the current value of the local variables contained in
any Script Group will be reset, if any exist.
52 InduSoft, Ltd.