https://forge.codesys.com/forge/talk/Engineering/thread/61e4b5048b/2020-06-03T12:00:12.170000ZRecent posts to Modbus problem2020-06-03T12:00:12.170000Z2020-06-03T12:00:12.170000Zfrancoinfhttps://forge.codesys.com/u/francoinf/https://forge.codesys.com06ce73e50cf5195a0929aecce94c13ac78341635

<div class="markdown_content"><p>Dear Codesys support,<br/> I have a communication problem with a card (Olimpia Splendid B0372) through the modbus protocol.<br/> The card works with this setting: modbus ascii, baud 9600, data bits 7, stop bit 1, even parity. By setting this conditions with codesys, I can't communicate.<br/> I bought a gateway, which allows storage between modbus ascii and modbus rtu (ICP DAS TSH-735), through which I can set up a communication, even if the device<br/> does not respond correctly in writing (while in reading I have no problems). The card has three registers, at addresses 101, 102 and 103. The operating mode is shown in the datasheet that I send in the attachment (in which it is written that it is necessary to write the registers 101, 102, 103 in sequence).<br/> In register 101 I can't write anything, while when I go to write in registers 102 and 103, whatever I write, it always inserts the value 0.<br/> I also tried to write individually in each register, but the situation does not change compared to what I reported above.<br/> By trying, however, with a modbus test software installed on the computer (Modbus Poll), I can write on the registers.<br/> Can you advise me how to solve the problem?<br/> Thanks</p></div>