AlexG Posted January 14, 2013 Report Share Posted January 14, 2013 Vision 280 Output coil O49 I try to read coil status via Modbus (Kepware). In Help address must started from 000000.I try 000049 and 005049, but its not work. Help... Quote Link to comment Share on other sites More sharing options...
Emil Posted January 14, 2013 Report Share Posted January 14, 2013 Why from 0000?! Please check the Slave address table for Standard Vision Division (VisiLogic > FB Modbus > Help > Slave addressing). The start address for outputs is stated there as 5000. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted January 15, 2013 MVP 2022 Report Share Posted January 15, 2013 If Kepware requires six digits for Modbus then 005049 should have worked for a V280. Can you try just 5049 without the zeros? Do you get an error or just no data? Joe T. Quote Link to comment Share on other sites More sharing options...
AlexG Posted January 15, 2013 Author Report Share Posted January 15, 2013 I work via Kepware. 5 digit addressing vs. 6 digit addressing. In my case O50 (Unitronics) => 005051 (KepServer). Its work. For example: MI18(Unitronics) =>400019 (KepServer) ML4(Unitronics) =>405109 (KepServer) (must calculate addres according to type). Very bad that is not table transformation addresses (SI,SB,O,I,T etc to Modbus addresses via KepServer) Thanks. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted January 16, 2013 MVP 2022 Report Share Posted January 16, 2013 What you've found with Kepware actually makes sense. Kepware is following the strict Modbus addressing scheme, which starts counting at 1. Unitronics starts counting at 0, so you have to add 1 to all your address requests. I've run into this before. I know it's a pain in the butt, but that's the way it is. Cara - it would be good if the Modbus Slave Addressing tables Help were updated to include an example of working with SCADA Modbus packages. Joe T. Quote Link to comment Share on other sites More sharing options...
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