poorejr

I am a novice user of the PMAC system and need some direction/examples on implementing an application. We are currently using a Geo Brick Drive (Type Turbo2, X4) to control a servos velocity based on tension feedback that is determined by a load cell connected to an analog input. The tension during processing is around 400 lbs while the system is engaged. At a known point a roll is retracted causing not only tension loss but slack in the film that runs through the system. This slack must be made up quickly by increasing the velocity of the servo drive motor. A minimum tension of 100 lbs is required when the system is disengaged as well. Tension overshoot can cause film breakage. Can you give me some ideas (example code would be very helpful as well) on how to implement this using the internal servo control of the PMAC? Thank you very much for your help.

Hi Jimmy, Thank you for the additional information. The fault did finally clear on the Brick after two days. I used the example code you mentioned, when faulted the temperature values were reading either -45 or 498 degrees, the 8 bit raw data was either 0 or 255. Once the Brick cleared the error it was reading from 29 to 40 degrees. The fault code on the Brick at was 1F5 a couple of times, otherwise it was 3F5, so the fault was evident on both axis 1 and axis 3. The latest error occurred after the Brick was powered up and left idle, the drives were not phased or moving. The error has also occurred when the motors were operating, all of the axis were halted when the error occurred. We are implementing a PLC to monitor the temperatures of the IGBT to better diagnose the issue. The model number of the Brick is GBL4-C0-500-14M00030, serial number is "C0008YSY". Can you confirm that the maximum average output for this drive is 12 amps? Does that mean that the maximum each axis can draw is 60 percent of the 5 amp continuous rating or 3 amps? Kind Regards, John

I have a question regarding an over temperature fault. On three separate occasions I have had an issue with the Delta-Tau Geo-Brick faulting with a 3F5 flashing on the status display. This immediately shuts down all of the motors. Can you give me some pointers on why this may be happening? Is there some way I can monitor the IGBT temperature in a PLC to help diagnose the issue? If so could you provide some sample code? I have been unable to clear the fault on one of the Bricks, is there a way to reset this? John.