Posted 28 Aug 2011 Is it possible to configure the Ethernet port on a CJ2M-CPU31 to use regular TCP or UDP comms? (Socket services?) In other words, suppose a device transmits a stream of bytes using UDP, can the PLC be configured to receive them? Ethernet is not exactly a strong point of mine, and I'm getting a bit lost in the docs / terminology. Any help appreciated. Even a straight "yes" or "no" is fine. Share this post Link to post Share on other sites
Posted 28 Aug 2011 dang it, I feared that was the case. Ethernet/IP or FINS protocol is the only way to use the port then? How would you interface with a third party device that did not support these? Not possible? Share this post Link to post Share on other sites
Posted 29 Aug 2011 Socket services is kind of like protocol macro for ethernet. It is used for receiving messages that are not of a standard Omron protocol. So, socket services is exactly what you are looking for. Share this post Link to post Share on other sites
Posted 29 Aug 2011 (edited) I agree. But it appears to be not possible. Have to say, this makes the ethernet port pretty restricted IMO. Edited 29 Aug 2011 by Andy_P Share this post Link to post Share on other sites
Posted 29 Aug 2011 Hi, yes, a good point of ETN21 was, it was possible to configure over the Ethernet itself with a browser. With EIP you need to send a FINS or CIP message to the EIP-module itself. It is difficult but not impossible to create such a message with socket service. Share this post Link to post Share on other sites
Posted 29 Aug 2011 I guess that I should have read the string a little bit better. I did not realize that you were talking about an EIP unit / CPU. You are correct, it does not support socket services. Share this post Link to post Share on other sites
Posted 29 Aug 2011 Hi Harald, thank you for your reply. So, I assume that you mean use socket service on the third party to construct an EIP compatible message that is transmitted to the PLC. Is that right? Do you have any examples you could point to? I'm having a hard time deciding exactly what format an "EIP message" should be in. For an "open" standard, it's pretty obscure to say the least! Apologies for being so dense, bit out of my depth right now with this. Share this post Link to post Share on other sites
Posted 30 Aug 2011 Sorry, I also misunderstood the original question. I cannot help you with EIP compatible messages. I am only familiar with FINS messages, Multiway and the manual W342 could help you. http://support-omron.fr/MultiwayE.php Share this post Link to post Share on other sites
Posted 30 Aug 2011 No problem Harald, thanks anyway. Share this post Link to post Share on other sites
Posted 31 Aug 2011 Why not just add an ETN21 & use that for what you are trying to do? Share this post Link to post Share on other sites
Posted 31 Aug 2011 Cost. The CJ1W-ETN21 is way, WAY too expensive. Share this post Link to post Share on other sites
Posted 31 Aug 2011 Is there a reason you are using a CPU with E/IP? Is your time cheaper than the cost of a ETN21? Share this post Link to post Share on other sites