Jacob Bauer Posted March 21 Report Share Posted March 21 Hi, We have been using the larger version of UMI-B1 EU Series with great succes, and now we are trying to use the smaller version, but we are having some trouble with the frequency, not corresponding to the value sent from the PLC. (V350-J-TA24) communication RS485, baud rate 19200, no parity check. PLC jumper is set to RS485 communication. I can see that the PLC is both recieving and transmitting data, and we are able to start and stop our Unit with the signal. When we turn on the Unit, and need to increase the frequency, then it just settles between 7-8Hz on the VFD. I can see from VisiLogic that the value the PLC requests is higher, but still the frequency on the small VFD stays between 7 and 8Hz. Max is set to 80.00Hz Excact same setup works with the larger version of the VFD, so I assume that we either made a mistake with the wires or it is some setting on the small VFD that has not been set. I have been through the settings many times, and the small VFD is set to the same settings as we have on the bigger one that is working. Anyone have any experience changing between the two models? More information can be provided, if needed Hope for some help, we are a bit stuck right now. Quote Link to comment Share on other sites More sharing options...
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