4/1/2015 1:25 AM | |
Joined: 3/22/2015 Last visit: 9/6/2022 Posts: 3 Rating: (0) |
I check on Google too, but i didn't found any example. Someone can help us? TNX |
4/1/2015 9:48 AM | |
Posts: 3093 Rating: (322)
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Hello Kodesis, Of course will telegrams with wrong CRC be ignored. Why should a CRC be transferred when it won't be evaluated? Regards, AttachmentModbus_over_serial_line_V1_02.pdf (1000 Downloads) |
Last edited by: Kaulquappe at: 4/1/2015 9:50:53 AM |
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This contribution was helpful to1 thankful Users |
3/13/2016 9:43 PM | |
Posts: 16 Rating: (0) |
Hello, in the S7-1200 system manual I have found that that TIA has an instruction Set_Feature that has an input EN_MODBUS_CRC.
I know I am dumm, but maybe someone can confirm me this? (I couldn't find such information anywhere else). Is it CRC-16? Would it communicate with a slave (a motor drive) using this type of check (an example of slave CRC-16 check is in the attachement). Would it work with CM1241 (RS422/RS485) [firmware v2.1] 6ES7 241-1CH32-0XB0 (using 1214 DC/DC/DC firmware v4.1)? Attachmentarac-flex-usermanual-hm-60065-7e (002)_Page_139.pdf (547 Downloads) |
3/16/2016 9:10 AM | |
Posts: 16 Rating: (0) |
Thank you for Your support Kaulquappe and Duris. Yes, I am going to implement Modbus RTU. Previously I had just really little experience with Modbus RTU and CRC checking is a new to me (I have't heard about CRC before). I am glad that Siemens takes care about the CRC check. |
This contribution was helpful to2 thankful Users |
7/7/2017 12:05 PM | |
Joined: 6/19/2017 Last visit: 4/26/2024 Posts: 7952 Rating: (162) |
New question published by Sick097 is split to a separate thread with the subject Writing program to calculate CRC - what is wrong?. Best regards |
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