• State Suggested Answer
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 47970 subscribers
  • Views 66 views
  • Users 0 members are here
Options
Related

Allen Bradley L83NSE firmware v38.01 and Plant Scada 2023 R2 8.5 Update 17

Yelena Nicholson

Hi All,

I'm running a trail with an Allen Bradley L83NSE controller running firmware v38.01 and a server running Plant Scada 2023 R2 8.5 Update 17. I'm using ABCLX Drive 5.7.0.2. The server seems to connect to the PLC fine but I am getting random values (normally large values) from my dints and reals. Just wanted to see if anyone else has had issues like these and how they fixed them. 

Thanks, 

  • 0

    Hi  

    This is a known issue and has been logged with the R&D team. The root cause is now understood:

    "During the tag database retrieval, the PLC is reporting incorrect data sizes for the tags. For example, a tag with the datatype DINT should have a size of 4 bytes, but the CompactLogix PLC (L320ERM, Firmware 38) is returning a data size of 0. Because of this, the driver sends the Add Item request with a data size of 0, which in turn results in a Read response that contains no data, as a result, incorrect values were displayed on the client side."

    I would recommend reaching out to AVEVA Technical Support and registering your site as impacted by this defect (original issue tracking number 4538786) and request to be notified when a Hotfix for this issue is available.

    If you are still in the development phase or testing phase of your project, you could consider switching to the OPCLX protocol, which makes use of Allen Bradley communications software (Plant SCADA uses OPC for communications). It will however require an additional license for the AB software to run correctly.

    ABCLX was a reverse engineered driver based on the CIP protocol, and is sometimes made incompatible when new hardware/firmware versions are released.

    Kind regards

    Olivier