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I tried using 100 and 0100 but it doesnt work. Any other way to do it. I can enter serial transfer mode during boot up and back up using prosave. But it would really help if i could reset the password somehow. Pls help. Thanks

Hi, We have a lot of lenze 9300servo vfd's in our plant. The feedback type in one of the parameters is set as resolver. The parameter has three choices- resolver, encoder or no feedback. I checked the motor run by this vfd and found that it has an encoder connected to it. What is the difference between a resolver and an encoder? I am new to automation and really require some basic guides to vfd's and plcs's. If u have any link to tutorials or pdf's please help. Thanks