johnglancy
Member
Hello. I have recently finished school and am fairly new to PLC's. I am having a problem with our powerflex VFD drives. We are an older remote plant which encounters a high amount of Utility line supply problems. At some point before I became employed, there apparently was a line surge which took down a number of our drives. A new drive was ordered and installed, but has yet to become operational. Here is some of the system specs. On this rack we are using a Logix 5555 1756-L55 unit, ControlNet bridge, 20-Comm-C adapter, and an AB Powerflex 700 VFD (non-vector) drive 20B D series A fw:3.002. One of our main issues is that the old .dno parameter configurations for the drive have been overwritten with the parameter file of one of our other powerflex 70 drives on the same rack(not sure how that happened....). We have rebuilt the parameter list to the best of our ability. Most of the parameters such as communication settings have been derived from the configurations of the other VFD drives on the rack. We just changed parameters such as nameplate information. When recently trying to go online with the drive we found that all status lights for the drive and communications are good, and the drive is recieving the hz speed septoint change(commanded freq. is changing on the LCD HIM). We just cannot get any output to the motor.
This is most likely not enough information for you guys to troubleshoot. Im hoping that somebody might catch something obvious. I am also wondering if anyone can give me sort of a check list for installing a new drive into a system like this. Our Rockwell TechConnect P.O. is in process, which may take a few more weeks and the engineer that was helping me with this issue has just changed positions so I am a little stuck.
I was thinking the problem may lie with one of the following: 1. parameter list i\o start\stop control is misconfigured. 2. EDS file may need to be updated if this is a newer version drive. 3. Needs to be remapped with the scheduler.
This is most likely not enough information for you guys to troubleshoot. Im hoping that somebody might catch something obvious. I am also wondering if anyone can give me sort of a check list for installing a new drive into a system like this. Our Rockwell TechConnect P.O. is in process, which may take a few more weeks and the engineer that was helping me with this issue has just changed positions so I am a little stuck.
I was thinking the problem may lie with one of the following: 1. parameter list i\o start\stop control is misconfigured. 2. EDS file may need to be updated if this is a newer version drive. 3. Needs to be remapped with the scheduler.
Please let me know what you guys think about this. I am a newbie so dont hesitate to educate me =].