sgull Posted July 26, 2015 Report Share Posted July 26, 2015 Hi All Not sure if I am posting this twice but I have a problem Modbus RTU I have successfully set up communication between the drive and a V1040 If I ask for a parameter on the drive, such as maximum frequency, I get a value such as -14582763 instead of the expected 60hz. If I change the value in the inverter the long number changes on the V1040 indicating that I am reading the correct parameter. I have tried to store the value into an MI,ML and DW in case there is an issue with data length. I know I need to read 2 MI to get the required result, could these be returned in the reverse order and if so how do I reverse these. Any help would be appreciated. Below is a Link to the modbus manual. Regards Denis https://www.google.ie/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCEQFjAAahUKEwj1oPeorvjGAhVCjdsKHT3lDqM&url=http%3A%2F%2Fwww.danfoss.com%2FNR%2Frdonlyres%2F844E0F42-AB58-4EAD-A11B-BDAED985391D%2F0%2FModbusRTUOperatingmanual20111117.pdf&ei=DZi0VbXmBcKa7ga9yruYCg&usg=AFQjCNGatXumxxFsBLenfbhFo1XC4MqGjQ&bvm=bv.98717601,d.ZGU&cad=rja Quote Link to comment Share on other sites More sharing options...
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