text: <s>[INST] Using Explicit Messaging to set / write commands to a PF525 VFD. I am trying to send (set) start/stop, direction, and speed reference commands to my PF525 VFD. I was able to get all sorts of information from the drive using explicit messaging. I was also able to set accel & decel times. I have set my VFD start source and speed reference parameters to EtherNet/IP, but struggle to find out what information to put into the Class, Instance (parameter [/INST] Hi Bernard and welcome to Engage! First of all I would like to inform you that I've removed the image attached to your post, as probably something has gone wrong during the upload and it seems to generate and error, without the chance to be seen. If you would like to try again adding it, please do that inside a new post. I've no experience in using that PLC. Anyway, I suggest to go through the following technote: QA59709 You can find useful information on how to use Ethernet/IP Register Objects to control your drive via explicit messages. The first part of the technote contains general information and then the instructions related to another model of PowerFlex drive. I suggest to read the very first part and then go searching the following section: Setting Register Object Explicit Message Instructions for Controlling a PowerFlex 525 with Embedded EtherNet Adapter Examples of code are related to Rockwell Automation controllers and their message instructions, but you can learn how the explicit messages are configured trying to implement the same for your controller. Hope this helps, fuzzy logic Please don't forget to use the LIKE button and highlight the decisive answer : REPLY > Make Best Answer​ \\n </s>