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  1. Net.Node.Unit on EtherNet/IP

    Hi, I am connecting several computers and NS12 HMIs with a CJ2 PLC using EtherNet/IP protocol. And I would like to know the FINS Address (Net.Node.Unit) of the HMI and the computers. I would like to use the FINS Write Access  Log Read (21 40) command to detect some commands from the HMIs and from the computers, however I am not sure how to differentiate the origin of each write access because the FINS Address is not related with the IP Address, in fact, different devices are using the same FINS Address.  I suppose I need to fix their addresses using an IP Address Table. Right?? Anyway, I only know to do that with UDP, but I don't know how to do that under Ethernet/IP. Thank you.
  2. I recently had an issue where a system shipped to a customer's site with a mismatch between the IP address loaded into the CJ1W-ETN21 card and the node dials on the card itself.  We had been testing the settings of the card by pinging the address and had assumed if the node dials were wrong we would not be able to ping the card.  As we just found out that is not the case! Both our quality department and our customer's end user were able to ping the Ethernet card, but the end user could not establish FINS communications because the node dials were not correctly set. Is there a way to test that the dials are correctly set?    Thank you!!!