Posted 11 Jan 2022 (edited) Hi, I managed to communicate a Kinco HMI with a Xinje PLC (XC3-48R) using RS-232. Also, I've established connections between the both equipment and my personal PC, for programming purposes. Currently the uploading and downloading, PLC bits reading and writing happens normally. But, when I disconnect any of the equipment from the PC, (HMI or PLC), the communication is lost between the PLC and HMI. How can I solve this and, remove my PC from the network by making the HMI master and PLC slave ? The software I use for programming is, (XCP Pro, Kinco HMIware) Edited 11 Jan 2022 by Maniesh Needed to add more Share this post Link to post Share on other sites