WTE Posted March 15, 2011 Report Share Posted March 15, 2011 Before I explain the “problem” first a bit of background. I’m totally new to the Unitronics products but It seems to be a very usefull product range. I have downloaded Visilogic and played with it a bit. Programming the instructions and functions doesn’t seem to be a problem. I have programming experience so I think I will manage that. The major problem for me is the RS232 data communication with an external data acquisition system. I have the protocol of the unit but I don’t know how I can implement it in the Visilogic software to use it in my program. I already have tried the communication init function and the FB protocol configuration but it’s not clear to me how I need to configure them. I’m not even sure that it is the right way to do it! I hope someone here can help me out. The communication protocol is as below: Communication protocol: · Send out STX to activate a 12-channel measurement and get the response in the following structure: · The first six ASCII characters contain the data from the first channel in the format: Sign, H, T, O, D, Tab (sign, hundreds, tens, ones, first decimal, tab)<br style=""> <br style=""> · The second six ASCII characters contain the data from the second channel in the format: Sign, H, T, O, D, Tab . . · The twelfth six ASCII characters contain the data from the twelfth channel in the format: Sign, H, T, O, D, EOT Sign, Hundreds, Tens, Ones, Decimal refer to mV Example: 2D, 37, 34, 30, 38, 09 means -740.8 mV of the first channel I need decimal values as a parameter in the software so I can use them in calculations. Anyone which can help me with it? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
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