robertschaefer wrote: I tried using labview again with helpful hints from this group - I downloaded the Logix5000 data access manual from the AB website. Error code 0x04 in the manual, and returned from the code indicates a "syntax error". I think this means I am still not getting the tag name correct.
Here's what I tried - "Command_REAL" is a float array, and _1912_Haystack.ACD is the name of the AB program.
I tried "Command_REAL",
"Command_REAL[0], "Program:_1912_Haystack.Command_REAL", "Program:_1912_Haystack.Command_REAL[0]",
"Program:_1912_Haystack.ACD.Command_REAL", "Program:_1912_Haystack.ACD.Command_REAL[0]" And all returned error 0x04 Also, I just learned this, the program name is Hay"S"tack, not Hay"s"tack, note the capital S in HayStack. How sensitive is the controller to capitalization of variable names? thanks, bob s. |
Hi Bob,
Looking at what you have there, from an RSLogix perspective, it appers that you're using the name of the RSLogix 5000 project as your "Program:" name when trying to access the tags. With regard to RSLogix, the actual ACD project file name will have no bearing on accessing the tags in an online PLC. If, within your RSLogix project, a Program is created within a Task, that is the name of the Program you would want to use.
If there are no programs in the main continuous task, for example, then the tags are likely controller scope and don't requite the Program: prefix. A tag, with the atomic data type real as an array, will be zero based, and must have the appropriate index referenced within brackets such as "Command_REAL where x is the index.
If you send the .ACD file that you're using, I'd be happy to reply with correct tag name format, controller, program or otherwise. I don't know much about LabVIEW as yet, but RSLogix 5000 I'm somewhat familar with.
Regards,
Jeff
