FieldServer FS-8707-06 - Manual (Page 11)

FS-8707-06 FST OPC Server for FieldServer Page 11 of 15
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8.2 Example OPC Server Setup
Remote Data
Array
The Data Array set up on the FieldServer
Start Address
Offset into the Data Array where the data will be stored. The default of 0 is applicable in
most cases.
Length in items
Set to the number of elements in the FieldServer Data Array or less. The maximum length is
determined by the datatype of the Data Array as follows:
Float and UInt32 – 325
UInt16 – 650
Byte – 1300
Bit - 2600
Store data as Datatype for the stored data. Per the OPC standards, Float is the suggested data type
Polling Setup The rate at which the OPC Server polls the FieldServer.
Primary Rate The rate at which the OPC Server will poll the FieldServer
Secondary Rate
The rate at which the OPC Server will poll the FieldServer after the access time is expired. If
the access time is less than the primary poll rate, the secondary rate will be used.
Phase Time delay before initial poll takes place
Access Time
Used internally to set the data access expiration time. The FieldServer will be polled at the
primary rate until this time expires, after which it will be polled at the secondary rate.