发表于:2006-06-29 17:17:00
8楼
我好象知道了:
The fully qualified name for an OPC item is called the Item ID (equivalent to
Item Name). The syntax for specifying a unique Item ID is DAServerdependent.
In OPC data acquisition DAServers, the syntax can be as follows:
TCPIP.PLC1.DB1,B20
Where:
Each component (delimited by a period) represents a branch or leaf of the
field device’s hierarchy.
In this example:
PLC1 is the name of the target PLC.
DB1,B20 is the specific data point (Item) desired.
[b]TCPIP.PLC1[/b]应该是link name,他是唯一的