List of Contributions

I work on an HMI system that connects to Allen Bradley ControlLogix and CompactLogix devices. I have Rockwell Publication 1756-PM0201-EN-P "Logix 5000 Controllers Data Access", dated September 2025. On page 12 of that document, there is a link to another document, TypeEncode_CIPRW.pdf. The link goes ...

Hi Fuzzy, Thanks for the advice. IMHO the behaviour you describe doesn't conform to the CIP specification. But I will modify my code to work with whatever it may encounter in the field. Our product doesn't allow the connection size to be configured manually, as we don't want to make the use interface ...

I work on an HMI system that connects to Allen Bradley ControlLogix and CompactLogix devices. A customer has a problem where they cannot connect to their ControlLogix device. It is a 1756-L81E with firmware 38.011. My HMI system sends its first Large Forward Open service to the ControlLogix with ...

I am developing software in C++ to communicate with Allen Bradley devices using EtherNet/IP. To improve performance, I am using the Multiple Service Packet service to encapsulate (i.e. bundle together) many Read Tag services. I restrict the number of services I encapsulate so that neither the ...

Summary: What services does the Wall-Clock Time Object support? I am writing some software which communicates with either ControlLogix/CompactLogix or Micro800 devices using EtherNet/IP. One of the things this software needs to do is set the wall clock time. For the Micro800 devices I have ...