text: <s>[INST] Powerflex 755 Speed Synch I have an application in which two motor speeds need to be synchronized under varying loads. One motor is a 30HP and the other is 10HP. The 30HP is the master and carries the bulk of the load. The 10HP should run at the same speed as the master to assist with load. Each motor has a 1024ppr encoder on the shaft. The application could be described as a conveyor with a motor on the head and tail pullys. If the speed is not sych'ed the belt either bunches up or stretches. I think gearing would be the best solution in this case? If I wire each encoder to it's drive for closed loop vector control, do I need a splitter to send the master signal to the slave? Can the master signal be wired to two drives without splitter device? It would be really neat if that connection (feedback) could be done over EIP? [/INST] If you do Ethernet/IP connections from PLC to drives, and your PLC is a controllogix, and your ethernet adapter for controllogix is an EN2TR or EN3TR, then you can do CIP motion and easily do what you're looking for (right, lots of ifs there). I have CIP motion in one application, but have been struggling with unexplained faults that reqiure drive-power cycling to clear. I'm not totally prepared to endorse CIP motion, but it's close. \\n </s>