ProLinx 6202-WA-DFNT-DFCM3, Руководство пользователя

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Reference 6202-WA-DFNT-DFCM3 ♦ ProLinx Gateway
Wireless EtherNet/IP to DF1 Master/Slave-3 ports
ProSoft Technology, Inc. Page 137 of 190
February 2, 2009
Each DDE connection requires three basic elements: Application, Topic and
Item. These three properties of a DDE link define the program providing the
connection, the topic to connect to and the item in the topic that you wish to
interface. All three are required for a connection. For this discussion, the
Application will always be RSLinx. The Topic is defined in the RSLinx OEM
release software and the Item is defined in the DDE client application where the
data is required. The link between the DDE server and the DDE client can be
established after these parameters are defined. The following illustration shows
the relationship of these elements and the facilities used in the DDE link.
1 The DDE Client application specifies the DDE link by specifying the
APPLICATION, TOPIC, and ITEM elements. For example, in Excel, enter
=RSLINX|PROLINX1! 'ReadData[0]' into a cell.
2 RSLinx is the DDE Server: APPLICATION = RSLINX.
And
RSLinx is used to define the TOPIC.
This is the communication link to the DFNT Module. In this example, a DDE
TOPIC is defined PROLINX1 for the communication link to the DFNT module.
3 The DFNT Module is used to serve data to RSLinx using the EtherNet/IP
driver with explicit messaging. Database is accessed using tag names (e.g.
ReadData[0]).