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7/31/2014 10:11 AM | |
Posts: 2 Rating: (2) |
Good day, I have faced the problem of Modbus rtu slave communication. I have one CPU 1511-1 PN and two interface modules 6ES7 541-1AB00-0AB0. One module is needed to communicate as Modbus master and another as modbus slave (program in attachment). I have read all the topics on forum, but cannot find the answer on my question (program I have downloaded from forum). Modbus master communicate without any problems but modbus slave cannot give me needed data. The communication I have tested with the help of laptop and Modbus Poll program (screen shot in attachment). The communication established and can read the data from modbus slave with modbus poll but it is not correct (I have write down Slave_Data[0] = 16 and Slave_Data[4] =32 to the slave data block but on screen shot you can see another data). As I understand the problem is with the correct pointing data, but I cannot make it in the correct form (test different ways). Thanks for help. Attachmentproject.zip (1024 Downloads) |
Last edited by: CS Moderator at: 7/31/2014 10:55 AMnew subject after splitting from /tf/WW/en/Posts/104271#top |
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