IDEC WindSRV - Manual (Page 22)

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Unchecked
The server will automatically generate the device's tags in a simple list without any
subgrouping. In the server project, the resulting tags will be named with the address value.
For example, the tag names will not be retained during the generation process. The image
below shows how the tag names were created using the tag's address.
Note: If, as the server is generating tags, a tag is assigned the same name as an existing tag,
the system will automatically increment to the next highest number so that the tag name is not
duplicated. For example, if the generation process were to create a tag named AI22 but there
already existed a tag with that name, it would create the tag as AI23 instead.
Auto Create
Auto Create is used to manually initiate the creation of automatically generated OPC tags. If the device's configuration
has been modified, clicking Auto Create will force the communications driver to reevaluate the device for possible tag
changes. Auto Create can be accessed from the System Tags for this device, which allows OPC client application to
initiate tag database creation.
Note: With the server's online full-time operation, these parameters can be changed at any time. Utilize the User
Manager to restrict access rights to server features in order to prevent operators from changing the parameters.
System Tags
System Tags are used to provide general error feedback to client applications, to allow operational control when a
device is actively collecting data and to allow the standard parameters of a either a channel or device to be changed by
an OPC client application when needed.
System Tags
The number of system tags available at both the channel-level or device-level varies depending on the nature of the
driver being used. In addition, application-level system tags allow client applications to monitor the server's status.
System tags can also be grouped according to their purpose as both status and control or parameter manipulation.
Parameter Control Tags
While the standard system tags provide needed feedback on server operation, the parameter control tags provide the
most powerful feature. Parameter control tags can be used to modify the operational characteristic of the server
application. This provides a great deal of flexibility in the OPC applications. By using the parameter control tags, users
can implement redundancy by switching communications links or changing the Device ID of a target device. Users can
also provide access to the tags through special supervisory screens that allow a plant engineer to make changes to the
communication parameters of the server if needed.
The tables below include descriptions of the following:
Application-Level System Tags