I have a SLC 5/05 with really slow Ethernet comms. It is on a network with three Proface screens but comms is just as slow when I connect directly to the CPU. I have cleared bits S:2/15 and S:33/7 as suggested and this did improve the comms slightly but it is still very poor. I have tried different laptops, cables etc. Just wondered if anyone has experienced this before and how it was overcome?