Symbol database
From Data Collection tab on the DDE/OPC Topic Configuration dialog box, if you select the
Use Symbols
check box, the DDE topic attempts to resolve the item as a symbol name in the selected symbol file. If this fails, it attempts to resolve the item as a PLC address. When selected for the first time, RSLinx Classic opens the Select Tag Name Database window. Select the correct file type you want to use and open the symbol file to use with this DDE topic. Five Descriptions are used for each file type. Valid file types are:- .csv for a text database (default format is Address,Ignored,Name,Description)
- .sym for an AI5/500
- .ctd for a RSLogix 5/500 symbol file
- .rsp for a RSLogix 5 data file
- .rss for a RSLogix 500 data file
- .acd for a Logix Designer application data file
- .tsv for a tabbed text database (default format isAddress<tab>Ignored<tab>Name<tab>Description)
CSV file format for RSLinx Classic tag name service
The file format for a CSV file to be used as a CSV tag name service (TNS) file is
<Address>,<Not Used>,<TagName>
Examples:
n7:0,,N7_0,
or
S:23/0,0,Bit_0,
Do not include spaces for the address field or for the tagname field. Also, include an ending comma on the line, and follow the same format for each line in the file.
Using this feature allows for offline tag browsing, which enables RSView32 and FactoryTalk Transaction Manager projects as well as other OPCBrowse-aware applications to be built offline.
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