10/12/2014 6:41 AM | |
Posts: 7 Rating: (0) |
Dear Pro. There is my problem: Driver Perfect Harmony is not work "Down Transfer" Operation for Induction Motors. I use Perfect Harmony (VFD) with the function "Synchronous Transfer" to "soft start" and "soft stop" for one induction motor 1.8MW. Synchronous Transfer Operation is controlled by one PLC S7-1200 via Wago I/O system. In firmware for Perfect Harmony, I use one counter to start VFD: Counter03(1) = TempFlag02_O * DE_RunningEnalbe_DI * ReadytoRun_I * DE_VFCRunRequest_DI; where: TempFlag02_O : signal reported VFD no errors. DE_RunningEnalbe_DI: signal allowing VFD run. ReadytoRun_I: system flag. DE_VFCRunRequest_DI: signal start VFD. In Up transfer operation, VFD works well. But in Down transfer operation: - PLC provides the VFD with the acknowledge from the line contactor. - PLC issues a "down transfer request" - PLC issues a "runrequest" to the VFD. VFD does not enter "DOWN_TRANSFER" state, which is still in "IDLE" state. Someone can tell me what I was wrong and what I can be done to implement Down Transfer. Thank you very much. Sorry for my english is very bad! PS: this is Parameter Dump File of VFD
AttachmentParameter Dump 5-10-2014 10-18.zip (615 Downloads) |
10/14/2014 3:25 AM | |
Posts: 7 Rating: (0) |
Thank you for Your answer! I have a NXG Control Manual A1AD19001588.
In my VFD: - Spinning load mode = Forward (parameter 2430) - Speed fwd max limit 1 = 100.0% (parameter 2080) I will follow your advice. I have read topic:/tf/WW/en/Posts/114138 Different boyn84, inDown transfer operation, myVFD does not enter "DOWN_TRANSFER" state, which is still in "IDLE" state. Best Regards. |
10/29/2014 1:58 PM | |
Posts: 7 Rating: (0) |
MyAttachment:screen of NXG debug tool (Status/Advanced). With Best Regards. |
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