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hos2 posted a topic in Other PLCsDose anyone have experience with Beckhoff FC3121 profibus master PCIe card connected to Siemens CP342-5 as a profibus slave? The data retrieved from S7 PLC is wrong, and keeps fluctuating rapidly. TwinCAT (TC) config looks OK, and it reports that the slave is OK and has no error. The slave is in Run mode with green LEDs. S7 side is believed to be OK as another master from HMS-Anybus retrieved the data correctly. Tried several versions of TC up to the latest (at the moment) ver. 2.11.2305. Here is a zip file with two graph pics of the two masters showing how the "same" data looks like in each case: https://drive.google.com/file/d/1ijlx6AXA3FX8GqgJjwWlFMxPxqT4xN9F/view?usp=sharing Thanks, Hos