Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 684)

System tags

B–3
The following tags record OPC ® client communication information.
These tags are added to the system folder when you configure an OPC
node in the Node editor.
The following tags record DDE client communication information.
These tags are added to the system folder when you configure a DDE
node in the Node editor.
Tag Name Type Displays information about
system\ComErrorStringOPC String Most recent OPC error message.
system\ComErrorValueOPC Analog Internal number of most recent OPC error.
system\ComStatusStringOPC String Current status of OPC communications. Will be the
same as system\ComErrorStringOPC if the error
condition still exists.
system\ComStatusValueOPC Analog Internal number indicating current status of OPC
communications. Will be the same as
system\ComErrorValueOPC if the error condition
still exists.
Tag Name Type Displays information about
system\ComErrorStringDDE String Most recent DDE client error message.
system\ComErrorValueDDE Analog Internal number of most recent DDE client error.
system\ComStatusStringDDE String Current status of DDE client communications. Will
be the same as system\ComErrorStringDDE if the
error condition still exists.
system\ComStatusValueDDE Analog Internal number indicating current status of DDE
client communications. Will be the same as
system\ComErrorValueDDE if the error condition
still exists.