Routing in the I/O tree

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  • This topic has 3 replies, 2 voices, and was last updated 4 years ago by PLCGuruPLCGuru.
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  • May 30, 2019 at 9:35 am #4282
    FAHoustonFred Houston
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      Karma: 23
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      I would like to add a powerflex 525 to a 1756-L72 processor. The powerflex is on a different network. I have a stratix 5700 router setup with vlans. If I set all of the proper gateway address can the PLC find and communicate with the drive? The 1756-L72 has a 1756-ENBT ethernet module. That address is 10.170.68.191 and the address for the PF will be 10.170.69.10. I have a vlan configured to translate from 10.170.68.xx to 10.170.69.xx. What do you think?

      June 2, 2019 at 9:01 am #4437
      PLCGuruPLCGuru
      Keymaster

        Hi Fred and welcome to the forums.

        It sounds like you have everything configured so in theory it should work. I’ve never personally isolated VFD traffic from the primary controller that is controlling it. Is there a specific reason why you don’t have it on the same network? My concern, is with delay and the overhead of managing the routing to/from the drive.

        Be sure to keep us posted on this as I’m interested in knowing how things work out.

        the other Fred!

        June 4, 2019 at 10:36 am #4555
        FAHoustonFred Houston
        Participant
          Karma: 23
          Rank: Padawan

          Thanks for the reply Fred. I need to conserve IP address on the network that the PLC lives on. That network is running low on addresses. I know that I could install an Ethernet module in the same chassis with the PLC and let the processor do the routing but that module is kind of pricey. I already have the stratix router so this would be a better solution from a cost aspect.

          June 4, 2019 at 5:21 pm #4575
          PLCGuruPLCGuru
          Keymaster

            Hi Fred,

            Yes I understand. I actually did two videos that show how what you’re looking to do can be accomplished. I’m not sure if you’ve checked them out:

            1. Stratix 5700 VLAN Routing

            2. Stratix 5700 NAT with Layer 3 Routing

            Give them both a watch and I’m sure you can extrapolate from the videos what it is you’re trying to do. I think the best way to do this would be to segregate off the cell or “work zone” behind a NAT, this way you can standardize private IP addresses behind the NAT and never run out. Then on the “public” plant side you handle the routing. Both these videos will give you a good explanation and visual of what I’m suggesting.

            Fred

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