Rockwell Disclaimer: The product is used surplus. This website is not sanctioned or approved by any manufacturer or tradename listed. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. Products sold by come with ’s 1-year, 2-year, or 3-year warranty and do not come with the original manufacturer’s warranty. is not an authorized distributor, affiliate, or representative for the brands we carry. Advice on the legality of sharing this type of data would be appreciated. If there is enough interest and can dig out the. The old E-Series are better at handling the through link compared to the newer units but the link takes priority over the HMI so no worries there. You can LAN enable the PLC if you use a Lan to RS232 converter (TIBBO do a good one) and link to the PLC through the HMI if you have one handy. But you can do a lot at that speed if you need to. The other point is that you can only run at 9600 e 7 1 serial speed and protocol. This way of accessing the device limits you to only be able to read and write the D Registers from D0 to D999 but with a bit of code in the plc you can jump around that and reach all of the registers. I communicate directly into the programming port using RS422 as I have the protocol from waaaaay back when (being old has it's advantages).
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