4/5/2017 1:34 PM | |
Posts: 16 Rating: (0) |
1SI Modbus/Uss controller 6es7-138-4df010ab0 ET 200s CPU I'm sending the messege from and array of bytes with $01P1<CR> written hexadecimally and i'm using the S_Send and S_RCV-function blocks AttachmentPictures.zip (553 Downloads) |
Last edited by: Kim86 at: 4/5/2017 1:41:09 PMLast edited by: Kim86 at: 4/5/2017 1:42:31 PMLast edited by: Kim86 at: 4/5/2017 1:43:37 PM |
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4/5/2017 2:13 PM | |
Posts: 16 Rating: (0) |
Byte sequence: 24 30 31 50 31 3c 40 52 3e ASCII-sequence: $01P1<CR> |
Last edited by: Kim86 at: 4/5/2017 2:15:23 PM |
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4/5/2017 3:59 PM | |
Joined: 1/17/2007 Last visit: 8/21/2024 Posts: 1545 Rating: (537)
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Not sure what calculations you are using there. The usual value of terminating resistors is about 120 ohm (or equal to the impedance of the cable). Plus 50cm seems a very short distance and shouldn't really need terminotors over such a short distance. You may find this link helpful http://www.bb-elec.com/Learning-Center/All-White-Papers/Serial/RS-422-and-RS-485-Applications-eBook.aspx. |
Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. |
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4/6/2017 1:21 PM | |
Joined: 4/28/2015 Last visit: 2/7/2024 Posts: 10533 Rating: (820) |
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With best regards... |
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4/6/2017 1:34 PM | |
Posts: 16 Rating: (0) |
Sorry, Duris. I'm not ignoring you. I just don't fully understand what you mean. Here a link to my program if it helps. And again, thanks. Have look at the datablock called S_Send to messege formats. AttachmentSEND_RCV_HWC_PN.zip (318 Downloads) |
Last edited by: Kim86 at: 4/6/2017 1:39:15 PMLast edited by: Kim86 at: 4/6/2017 1:40:37 PMLast edited by: Min_Moderator at: 4/6/2017 1:45:51 PMAdd attachment |
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4/6/2017 2:16 PM | |
Posts: 16 Rating: (0) |
Ok. The documentation on my desk next to me i'll try to scan the most relevant pages and attach them here Update: Here it is attached AttachmentDOC170406-20170406131942.pdf (382 Downloads) |
Last edited by: Kim86 at: 4/6/2017 2:22:37 PM |
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