text: <s>[INST] Kinetix 300 , E14 Fault. Talking to new 1769-L27ERM-QBFC1B CompactLogix Summary: Kinetix 300 Comms problem I have been trying for a while now to get a Kinetix 300 2097-V33PR5 to communicate with a New compactlogix 1769-L27ERM-QBFC1B. I have two of the Kinetix 300's and neither will communicate. Both with the E14 Error. Unfortunately , one is also giving the E07 error as well. It is connected to a TLAR actuator. I have previously setup about 15 of these same drives to communicate with Controllogix L61 processors and they worked fine. (Other than terrible cabling/E07 issues that plagued us for a while) I have of course checked all the obvious things. Ethernet cables, IP Addresses, RSLogix 5000 setup, PLC running fine. PLC just gives the Connecting....., Connection failed when viewing the module. I thought it had something to do with Firmware because the Kinetix are brand new and shipped with Firmware 1.71 which doesnt seem to be listed or available as a download\?? I downgraded them to the avaialble 1.67 and it didnt help. I've even tried going down to 1.50 since thats what I had used in the past. Compactlogix is at 20.01. Any help or ideas would be appreciated. [/INST] Call with Tech support rooted out the problem today. Seems that Rslogix5000 V20 has a problem and now and will not communicate with the Servo Drive if the Use Unicast connection over Ethernet I/P box is checked in the Servo module Connection properties. Its checked by default and worked fine in V18/V19.. \\n </s>