Posted 11 Jun 2017 I purchased a couple of C28P units on Ebay, thinking they were I/O units which I could connect to my C28K. Unfortunately, when I tried to use syswin software to enter a ladder program into the units, I got rejected by the software. Can someone tell me what software I need to communicate with C28P. If not, does anyone want to trade these units for C28K.. Share this post Link to post Share on other sites
Posted 11 Jun 2017 Use Syswin. Set Model for C20. C20P is a C20 in a C28K package. Share this post Link to post Share on other sites