ABB SPA OPC, Руководство пользователя

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• The names of menus and menu items are boldfaced. For example, the File menu.
– The following convention is used for menu operations: MenuName > MenuItem
> CascadedMenuItem . For example: select File > New > Type .
– The Start menu name always refers to the Start menu on the Windows Task Bar.
• System prompts/messages and user responses/input are shown in the Courier font.
For example, if you enter a value out of range, the following message is displayed:
Entered value is not valid. The value must be
0 to 30.
You may be told to enter the string MIF349 in a field. The string is shown as follows
in the procedure:
MIF349
• Variables are shown using lowercase letters:
sequence name
• All the figures in this document have been taken using Windows XP.
Terminology
The following is a list of terms associated with the SPA OPC Server that you should be
familiar with. The list contains terms that are unique to ABB or have a usage or definition
that is different from the standard industry usage.
Term Description
Data Access; DA An OPC service for providing information about process data
to OPC clients.
Device A physical device that behaves as its own communication node
in the network, e.g. protection relay.
OPC item Representation of connections to data sources, i.e. object
properties. An OPC item is identified by a string. Associated
with each OPC item are Value, Quality and Time Stamp.