Connectivity Issue

  • 1 July 2021
  • 1 reply

Userlevel 2
Badge +7

Good morning Fiixers, I hope everyone is doing well

We are wondering if anyone has ever had issues with adding to many devices to their PLC network. 

Earlier this week, we attempted to add 4 additional devices to our PLC network. We are using an Allen Bradly 1769-L35 PLC to run roughly 32 ethernet connected devices, like Allen Bradley 1734-AENTR remote I/O and PowerFlex VFS’s.

We attempted to add 4 more devices to the network,( All IP’s were pinged before adding the devices ) and the network bricked, it would not allow COMs between the RsLogix 5000 or our Maple HMI Easy Builder software on our computers. Once we remove the devices from ethernet network, and reset the 1769-L35 PLC, ( Dropping out one whole half of the plant ) we were able to establish connectivity again. 

We are operating under the assumption that we exceeded the amount of ethernet devices that are able to run on the Allen Bradly 1769-L35. We do have a call in with support to confirm this assumption, but are wondering it anyone else has experienced these issues. 


Thank you


1 reply

Userlevel 3
Badge +5



It sounds like you are a lot farther ahead of the rest of us.  We are just talking about adding machine metrics to our cleanroom.


Hope you got your devices networked.  Did you get help from FIIX?



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