I have been working on this drive and motor as part of a reliability project and have already gone after some improvements in the field circuit (see other forum post). This time I attempted to run P051=25 because since the original tuning we have changed the motor two times. I kept getting the P050 error with a value of 4. Checking the manual this told me the following:
-P100 or r072 is very much smaller than the actual motor rated (verified not to be the case)
-La > 327.67mH (I have a pdma motor tester and we performed a standard motor test on the armature circuit which came back with a 3.57 mH a value in the range of the other motors that we have as spare)
-P100 very much smaller than r072 (the motor is rated for 330A while the drive is derated to 566A so I adjusted this value down to 425A and ran the test again with the same results)
-Armature circuit short-circuited (again the motor tester came back with a armature resistance of .087 Ohms which matches what is in the drive for armature resistance and close to the other motors plus cable leads)
So, are there some tricks of the trade that I can do so that the test can run successfully?
Also, I do have all this data from the motor tester for the resitance and inductance for the field and armature circuit. Should I just put this in? Does the drive temperatrue correct the resistance readings for the field? For example, the motor tester measured 24.9 Ohms on the field and we supply the temperature of the motor obtained via temperature gun as 37 C. The tester than temperature corrects the resistance to be 25.45148 Ohms. Which value should I enter? When the drive runs the test will it just come up with the measured resistance of 24.9 Ohms or does it also try and do some temperature correction of its own? The drive currently has 30 ohms in the field resistance value.
Any help would be appreciated. Thanks.