Dynamic node allocation and Ring redundancy

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1

Hi all,

I am looking for some clarification on Dynamic Node Allocation (DNA) and Ring Redundancy.

As per Automation Studio documentation, DNA can’t work with Ring Redundancy (Please see the attached screenshot).

Powerlink_DNA_Redundancy
Powerlink_DNA_Redundancy1440×900 123 KB

As per the specification (EPSG DS 302-E), Ring Redundancy and DNA can co-exist. The screenshot is given below. However, I do not find any information about the statement “However special attention must be paid on switching on and off the hub ports.”

image

I know, the preference should be given to the specification, but why Automation Studio documentation contradicting with Speciation?

Please let me know your thoughts.

Best regards,

Mohammed Shibin

2

Automation Studio documentation can contradict the specification because of the actual implementation on B&R Powerlink Managing nodes.

As the limitation is documented on multiple pages in the help, I would say that DNA can’t be combined with ring redundancy.

Limitations:

  • Longer startup times
  • Cannot be combined with ring redundancy
  • Cannot be combined with cable redundancy
  • Cannot be combined with controller redundancy
  • Cannot be combined with the standalone function
  • Not possible for Intelligent controlled node (iCN)

Automation Help: Dynamic node allocation (DNA)

Automation Help: POWERLINK ring redundancy