Posted 12 Apr 2018 (edited) Guys I'm having some troubles (as usual) I have datasheet for my profibus slave device (attached). I've probably done proper configuration in cx-configurator, I've got CIO 3200 (output) and 3300 (input) addresses for that communication. There's the question. How can I assign plc bit to specific valve position (its address)? I've made simple program where I can change 3200.00, 3200.01 etc. states but BF led on prm21 still flashing, and nothing happens. Edited 12 Apr 2018 by malyalewariat Share this post Link to post Share on other sites