OPC90 Server
7 Bl
The following sub-sections define the OPC90 Server blocks available for
interfacing with Bailey systems. For ease of access, the blocks are presented in
alp
It is im
OPC90 Server to successfully communicate with the Bailey system. This block
declares an instance of the Bailey driver and its operational characteristics. The
rem
report
configu
report
the Bailey NCIU02/03/04, INPCI02 and INICIxx interfaces.
Each OPC90 Server block definition includes a table, which summarizes the
attributes and tag names supported by the block type. This table contains four
columns which are “Attribute / Tag Name”, “Data Type”, “Access” and
“Description”.
“Attributes” are fields that must be setup as part of defining the block within the
OPC90 database. Most of these fields are not available to the OPC Client as an
OPC tag. OPC90 supports online changes to some of these attributes via the
block properties, available by right clicking on the block and selecting properties.
This feature is handy for correcting block address definition problems when
OPC90 is currently online providing data to OPC Clients. Note that the block
properties dialog is the same one used to configure new blocks (see preceding
add block section). Just enter the correct address, and OPC90 will re-establish
the point within the ABB Bailey interface. Once the update has been confirmed
to correct the addressing problem, don’t forget to save it using the OPC90 File-
>Save menu selection.
“Tag Names” are fields available to the OPC Client. The “Data Type” column
gives the default OPC tag type for each defined tag name.
The “Access” column defines how the OPC Client may use the tag name. A
value of “Config/Read” defines the entry as an attribute (attributes are also
identified with
italicized
text). A value of “Read/Write” means the OPC Client is
expected to provide the value for that tag name. A value of “Read/Write” means
the OPC Client can both read and write the value which is also sourced by the
Bailey system. For this type of tag access, values received from the OPC Client
will be written to Bailey but OPC90 will also look for values received from the
Bailey system and write them to the OPC Client via the associated tag name.
The “Description” column gives the purpose for each attribute and tag name.
ocks
habetical order.
portant to note that a Device Block (DEVICE)
must
be configured for the
aining OPC90 Server blocks provide access to the various Bailey exception
blocks, polling outputs of non-exception reported blocks, system status,
ration reading and tuning of any Bailey block in the system and the output
block types. Note that the output report block types can only be used with
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