4/24/2020 6:37 PM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello Igor; First, let's start with a short description of Profibus standards, describing Class 1 and Class 2 masters in a very detailed fashion: https://www.automation.com/en-us/articles/2009-1/introduction-to-profibus-dp So, basically, a Clsss 2 master would be an HMI or a SCADA page requesting data from the PLC (Class 1 master). This data request uses acyclic data exchange functions. A Class 1 master typically uses cyclic polls to its configured slave. For some reason, based on the error message you received (and I am not completely familiar with the configuration intricacies of ABB drives) the ABB drive Profibus interface (RPBA, FPBA,...?) is not capable of answering cyclic polling requests from the Class 1 master. Is this a voluntary setting in the configuration, or a mistake by the programmer, or is the drive Profibus interface damaged? That might be an answer that can be provided by ABB support. Hope this helps, |
Last edited by: dchartier at: 04/24/2020 18:39:00Last edited by: dchartier at: 04/24/2020 18:41:21 |
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4/26/2020 9:07 AM | |
Joined: 10/15/2015 Last visit: 11/24/2023 Posts: 2 Rating: (0) |
Hi dchartier! Thanks for the answer! Is such an error possible if the GSD file was used with the DP-V0 protocol instead of DP-V1? As I understand it, the DP-V1 protocol supports acyclic communication with the PLC.
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