text: <s>[INST] Powerflex 753 losing Max Fwd Speed after power Reset We are having a powerflex 753 connected to the PLC over ethernet. When we try to change the Max Fwd Speed (P520) from 50Hz(old ) to 70Hz(new) , we found that it takes the setting and motor runs a bit faster , but when we power recycle we see that the Max Fwd speed goes back to 50Hz . The parameter P300 is set to Hz only and not RPM We tried for other parameters and they are getting saved even after restart Any suggestions ?? [/INST] Hi Rahul, Disconnect the drive from the Ethernet communication and change the parameter P520 using keypad. Recycle the power and check, If Drive retain the value, then check the datalinks. If Drive lost the updated value of parameter and return to default value, flash the drive on latest firmware.. \\n </s>