LGSF

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About LGSF

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  • Country United Kingdom
  1. We seem to have a fix for the installation. I swapped to a spare drive of the same type and still got the ground fault on run command. There was 0 for parameter 41 - (Accel Time 1) which was the same as the other rolling mill with the same PF525 drive which has no problems, this was setup and commissioned by a subcontractor. I changed it to 10ms and now the initial instant current draw appears to be been ignored and the mill has run in a stable condition for a short but reasonable production run this afternoon. Whether this is a correct resolution to the issue is yet to be seen, and I’m not a vfd expert in any way, but I’m not convinced the F013 ground fault was a true fault diagnosis given by the PF525 fault code.  
  2. Yes we are in vector mode Meggered at 1000v  Disconnected at vfd output terminal  Tested with another motor and lead following my last post with same original results  I have a spare drive that I’m going to swap across now and try   Thanks all for your input so far
  3. Jog is around 15% of max line speed
  4. Thanks for your response  We are currently checking all wiring  Have tried running vfd with a different motor and cable, also tried with motor disconnected  Same fault F013 Seems to be pointing towards being a faulty drive… The shame is that we refurbished this machine prior to lockdown but never commissioned it and it’s never turned a wheel until we need it now 18 months later. Probably out of warranty…   Also updated firmware from 5.001 to 7.001 but still no improvement 
  5. Hi We are getting a Ground Fault error F013 consistently (9 times out of 10) when we try to run one of our rolling mills in auto mode. We do not get the issue when we jog forwards in manual. This is a machine that we refurbished with this new drive and a new Nord motor. We have megged the motor and it is good. We have checked the supply cable between the vfd and the motor and that is fine. We have tested the setup with supply cable earth in 3 states, earthed both ends, earthed motor end only and completely unearthed. Obviously this was purely for fault tracing and not intended for permanent state. The fault remains. The firmware is 5.001 I believe. There is an end encoder on the end of armature and 24v case fan fitted to the motor. We have a twin machine that was refurbished at the same time and that is working fine, only difference is an SEW motor of the the same size. Our plan is to pull the known good drive and temporarily trying it, without auto tuning so we can reinstate the working mill. Does anyone have any thoughts on further checks or a solution please?   Many thanks in advance