Pawks666 Posted January 15, 2016 Report Share Posted January 15, 2016 Hi all, Is there a way to measure power factor of a three-phase generator with jazz plc (JZ20-R31). I have an option to use an existing device(Sentron pac3100), but only float data type avaliable.Another option is Elnet which has integer data avaliable, but integer 0 when PF is 0,85 doesnt really help... I probably could get it with some math functions between real and apparent power, but that isn't the most elegant way to do it and is also error prone. Is there another way with JAZZ or do i have to use a different controller? Thanks in advance, Best regards, Pawks Quote Link to comment Share on other sites More sharing options...
s.pratt Posted January 15, 2016 Report Share Posted January 15, 2016 Hello Pawks, There is no way for the Jazz units to directly measure power factor. We can only read in DC discrete or analog signals. Is there another device in the system measuring the PF, then sending a signal to denote the PF? Or were you planning to have the Jazz directly measure this value? Quote Link to comment Share on other sites More sharing options...
Pawks666 Posted January 18, 2016 Author Report Share Posted January 18, 2016 Hi, I see that i posted a question with too little information, sorry for that. My plan is to connect jazz to a power monitoring device via modbus. The problem is, that jazz only "understands" integers and my existing power monitoring device (sentron pac3100) has only float type data avaliable. Another possible device (elnet) that has integer type data avaliable only has the whole part avaliable (0 for 0.95) which isn't really usable. So my question: is there any avaliable power monitoring devices that are compatible with jazz controller? Thank you Best regards, Pawks Quote Link to comment Share on other sites More sharing options...
s.pratt Posted January 18, 2016 Report Share Posted January 18, 2016 Hello Pawks, Unfortunately, there are none that we are aware of - maybe someone else on here has used one they can recommend. Is there a way to split the float into two integers on your Sentron? This way we could read the two inetegers (whole part and fractional part) then "put them together" in the Jazz. Otherwise, you would need to find another device that reads the PF as a whole (scaled) integer. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Pawks666 Posted January 18, 2016 Author Report Share Posted January 18, 2016 Hi, Thank you for reply. I was afraid of that. There is no way of splitting floats on Sentron.I'm thinking now that the easiest way will probably be to get a different PLC. Thanks again, Best regards, Pawks Quote Link to comment Share on other sites More sharing options...
s.pratt Posted January 18, 2016 Report Share Posted January 18, 2016 Hello Pawks, No problem. Glad to help. Then next comprable PLC to look at would wither be a Samba or a V120, depending on the application size needed. Please let me know if I can help with anything further. Quote Link to comment Share on other sites More sharing options...
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