Tim Raines

Tuesday, September 11, 2007 Praveen, I found out how to display the "@IsPresent" status from the RSI OPC Test Client! I was expecting to be able to browse the tag. When the Topic is configured with the processor type as PLC-5, you can't see any tags. Configure the Topic with the processor type as Logix 5000 and the Tags appear (except the "@" status type tags) and of course can be browsed in. Well, all you have to do to get the Topic with the processor type set to PLC-5 to work is just type the processor and tagname in the ITEM NAME box on the ATTRIBUTES tab using the RSI OPC Test Client! For example, to get back a value for the "@IsPresent" with a PLC processor named "BOILER", here is what one would type in the box: [bOILER]@IsPresent If you are using ControlLogix, and don't mind getting back a string value instead of a number, you don't have to add a new topic with the processor type set to PLC-5 to get the processor status. Instead, just use configure the topic as you usually would (Processor type set to Logix 5000), and use the @Status. If all is well, @ Status will return an "OK" string to you! Anyway, maybe this will help others with the same problem as the Tech Bulletin in the RSI website is not very clear on this matter. Thank you, Tim --------------------------------------------------------------------------------------------------------------------------

Hello itong and rpraveenkum, I too have been trying to real the @IsPresent status bit from a ControlLogix processor via an OPC Client. I'm trying to use the status bit in software from SyTech called XLReporter. When I contacted Rockwell Tech Support, they said that I had to create an OPC Topic Item and configure the data collection processor type as a PLC-5 instead of Logix 5000. I had already been using a topic with a processor type of Logix 5000 and could browse in tags, but of course could not browse in the predefined tags such as @IsPresent. I created the new topic as they told me with the PLC-5 as the processor type, but I cant see ANY tags to browse. Anyone out there have an idea what to do? Thank you, Tim