Anton78 Posted September 5 Share Posted September 5 Hello, we have 6 inverters DEYE 50KW hybrid installed in 2 groups, but the distance between the 4th and 5th inverter is about 90m. it turns out that they communicate via CAN and not via RS485 and the signal does not reach the inverter at all and the machines cannot work properly in parallel (each inverter has a battery pack) Thanks Quote Link to comment Share on other sites More sharing options...
JaseZA Posted September 6 Share Posted September 6 CAN has some distance limits based on transmission speed: Speed in bit/s - Maximum Cable Length - 1 Mbit/s - 20 m (65 ft) - 800 kbit/s - 40 m (131 ft) - 500 kbit/s - 100 m (328 ft) - 250 kbit/s - 250 m (820 ft) - 125 kbit/s - 500 m (1640 ft) - 50 kbit/s - 1000 m (3280 ft) - 20 kbit/s - 2500 m (8202 ft) - 10 kbit/s - 5000 m (16404 ft) This assumes ideal conditions - shielded cable with limited external interference. I'm not sure what speed DEYE use but industry standard has been 250 kbit/s for a while - so you should be able to achieve 250m. I would look at the cable you're using for the CAN comms and the path it takes. Investing in a shielded twisted cable and trying to keep it separated from high current AC wires will go a long way to increasing the distance you can cover. WannabeSolarSparky and Steve87 1 1 Quote Link to comment Share on other sites More sharing options...
Steve87 Posted September 6 Share Posted September 6 @JaseZA has hit the nail on the head. Shielded & twisted pairs is fundamental with CANbus. No other way. Quote Link to comment Share on other sites More sharing options...
abd7 Posted September 6 Share Posted September 6 Apart from the 4th and 5th being 90m apart, how far away are the other inverters that are connected in parallel? Is it just two connected in parallel or more than that. With canbus the total distance from end to end matters, not just between two nodes. https://www.buenoptic.net/encyclopedia/item/537-maximum-cable-length-for-a-can-bus.html If you don't come right with the shielded cable then you can try contacting these guys, they do canbus repeaters and can advise on the best way to solve your issue. https://www.idx.co.za/technologies/canbus/ Quote Link to comment Share on other sites More sharing options...
Anton78 Posted September 6 Author Share Posted September 6 so the baud rate is 9600, from Deye answer parellel distance max 5m, we have 6 inverters from 1 to 4 no problem but fron 4 to 5,6 90m distance ..... Quote Link to comment Share on other sites More sharing options...
Anton78 Posted September 6 Author Share Posted September 6 and we use cables cat 6a but not from cables jus the distance Quote Link to comment Share on other sites More sharing options...
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