IDEC WindSRV - Manual (Page 71)

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data. When this occurs, the scaled value is also forced outside of the established range. To
prevent this from occurring, the High and Low Clamps can be used to constrain the scaled
value to the range specified.
Units
The server also allows a unit's string to be assigned to a scaled tag. The units' string can be
up to 32 characters long.
Negate scaled value This parameter forces the resulting value to be negated before being passed to the client.
Note 1: The OPC server supports the OPC tag properties available in the 2.0 Data Access specifications. If the OPC
client being used supports these properties, it can automatically configure the range of objects (such as user input
objects or displays) by using the Scaling settings.
Note 2: With the server's full-time online operation, these parameters can be changed at any time. Changes made to
Tag Properties will take effect immediately; however, OPC clients that have already connected to the tag will not be
affected until they release and reacquire it. Utilize the User Manager to restrict access rights to server features in order
to prevent any unauthorized operator from changing these parameters.
Tag Selection
The Tag Selection dialog is used to quickly find an existing tag in the server project in order to select it for editing.
Note: Once a tag is selected, users will be returned to
Tag Properties .
What is a Tag Group?
This server allows tag groups to be added to the project. Tag groups are used to tailor the layout of OPC data into
logical groupings that fit the application's needs. Tag groups allow multiple sets of identical tags to be added under the
same device: this can be convenient when a single device handles a number of similar machine segments.
Tag Group Properties
From an OPC client standpoint, Tag Groups allow users to segregate OPC data into smaller tag lists, thus making finding
specific tags easier when browsing the server. The following image used the supplied OPC Quick client to create Cell1
and Cell2 tag groups and simplify the OPC Client browsing.