Posted 24 Aug 2016 I am wondering why some USB to Serial devices will work with Allen Bradley PLC's and others will not. Trying not to have to purchase a $190 cable for simple serial communications. Share this post Link to post Share on other sites
Posted 24 Aug 2016 (edited) You don't have to pay that much. See links, these work. https://www.amazon.com/Tripp-Lite-USA-19HS-High-Speed-supports/dp/B0000VYJRY http://www.plccable.com/allen-bradley/ Edited 24 Aug 2016 by Mickey Share this post Link to post Share on other sites
Posted 24 Aug 2016 What PLC are you trying to connect to? Share this post Link to post Share on other sites
Posted 24 Aug 2016 CompactLogix and Slc500 processors. If I use someone's AB cable... no problem. If I use any generic USB to serial cable it will not connect. Share this post Link to post Share on other sites
Posted 24 Aug 2016 USB-to-Serial cables are a huge pain with RSLinx. I had great success with Prolific, but even with that brand one has to experiment and learn the right process. You could consider purchasing a laptop with a hard serial port (Panasonic Toughbook had a few models). Or a docking station with a hard serial port. Share this post Link to post Share on other sites
Posted 24 Aug 2016 We've sold lots of this one with no problems reported. It is the same one I keep in my laptop bag. http://www.theautomationstore.com/allen-bradley-slc-programming-cable-1747-cp3-usb/ 1 person likes this Share this post Link to post Share on other sites
Posted 30 Aug 2016 We used our first 5572 the other day. I saw "we" but it was another "SCADA guy" that I work with from time to time. We traded a few emails as he progressed through flashing and downloading the controller. He just plugged in a Type A to Type B USB cable and flash to programmed time was only a few minutes. 1/6th of the way through this century and AB finally caught up with mid 90's USB technology :) Share this post Link to post Share on other sites