6/27/2013 7:50 PM | |
Posts: 4 Rating: (0) |
Good afternoon everyone! in an application I'm using an S7200 cpu226 to communicate with a tranmissor weighing ALFA2710 manual link (http://www.alfainstrumentos.com.br/arquivos/Manual_de_Programacao_2710_ver2.0.pdf). I'm using port 1 S7200 with libraries MBUS_CTRL_P1 MBUS_MSG_P1 and, following the example of the S7200's manual. In the end I can not communicate with my slave. if someone could help me I would be very grateful. Thank you!
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Last edited by: CS Moderator at: 6/30/2013 10:39 AMnew subject after splitting from /tf/WW/en/Posts/83381#top |
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6/27/2013 8:17 PM | |
Joined: 5/28/2013 Last visit: 2/1/2023 Posts: 112 Rating: (3) |
Rodrigo, what is the error code that your MBUS_MSG function block signs out? |
6/27/2013 8:35 PM | |
Joined: 3/18/2008 Last visit: 12/8/2023 Posts: 1750 Rating: (272) |
Hello, i found this reply from earlier post from smiffy There are many reasons why you could be experiencing problems with getting the communications to work. Remember, the S7 is the master on the network, you must send valid requests to the device to get data returned. We need more information to diagnose the problem. Things to check:- 1) Are you using the correct hardware interface (e.g. RS232/RS422/RS485)? 2) Are your serial port settings (e.g. baud rate, parity) the same for both master and slave? 3) Are you sending requests to the correct slave address? 4) When is the LED status for the CP? 5) Are there any errors codes from the modbus software? If so, what are they? |
VANDE MATARAM..... |
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6/28/2013 5:53 AM | |
Joined: 11/18/2010 Last visit: 8/5/2022 Posts: 523 Rating: (32) |
hi , please find below Document in chapter 12 modbus communication possible options are mentioned S7 manual Modbus RTU communication viral patel |
This contribution was helpful to1 thankful Users |
7/16/2013 1:46 PM | |
Joined: 5/28/2013 Last visit: 2/1/2023 Posts: 112 Rating: (3) |
Thanks for your feedback |
4/10/2018 12:07 PM | |
Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172) |
New question published by gabbar is split to a separate thread with the subject Need sample program for modbus slave communication with s7-200 . Best regards |
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