8/18/2017 6:39 PM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello Msorich; Have a look at the attchment below, I have tried to gather information from this manual to help you out.
https://support.industry.siemens.com/cs/attachments/99685159/G120_Field_busses_FH17_0414_eng_en-US.pdf?download=true Notice that STW (control word) and NSoll (Speed setpoint) ae always the first and second word in the PZD section of the telegram (outputs to the drive and ZSW (Status word0 an NIST(Speed actual value) are the first and second word of the telegram in the input section. Profibus/Profinet exchanges are always defined from the master/controller point of view. Informtion on the ProfiSafe telegrams are found in this document: https://support.industry.siemens.com/cs/attachments/68047679/FHS_012012_eng_en-US.pdf?download=true Hope this helps, |
Last edited by: Jen_Moderator at: 8/25/2017 12:40:09 PMInserted right links. |
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This contribution was helpful to1 thankful Users |
8/18/2017 9:25 PM | |
Joined: 6/28/2017 Last visit: 12/20/2022 Posts: 661 Rating: (40) |
Thanks so much!
I need to see this in the graphic view just for my better understanding. The chart attached below. Msorich AttachmentTelegram_111_chart.pdf (502 Downloads) |
8/21/2017 2:16 PM | |
Joined: 10/11/2006 Last visit: 9/18/2024 Posts: 5906 Rating: (804)
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Hello, if you want to know the internal structure of Telegram 111 you should take a look into the list manual: https://support.industry.siemens.com/cs/ww/en/view/109781807 chapter 3.9 page 2131. There you see the used words. And PZD12 / 12 is just the total length of this telegram, meaning 12 words in send and receive direction are used to communicate to the PLC. ProfiSafe has nothing to do with this telegram 111. If you do ProfiSafe communication you will add an additional telegram to the axis (e.g. telegram 30). Then your axis has 2 telegrams (111 + 30) to communicate. |
Last edited by: Technology Team at: 03/28/2023 09:03:18Last edited by: Technology Team at: 03/28/2023 09:08:02Last edited by: Technology Team at: 03/28/2023 09:24:15Link to list manual and chapter and page number information updated With best regards, |
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This contribution was helpful to2 thankful Users |
8/21/2017 7:15 PM | |
Joined: 6/28/2017 Last visit: 12/20/2022 Posts: 661 Rating: (40) |
So it looks like serial data circulation Telegram 111 (ZSW...) -->Telegram 30 --> Telegram 111 --> Telegram 30?????? In the near future I'll have to tell customer's technicians some theory. I gathered from all over the web information about telegram structure and completed my chart. If someone needs readable and adapted for better understanding the Telegram structure chart, you can find it below attached. AttachmentTelegram_111_chart_completed.pdf (414 Downloads) |
8/23/2017 12:21 AM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello Msorich; You are right, in that the RS 485 specification does not permit parallel transmissions (it is a serial communication specification, so that is that). The same prohibition is valid, by CSMA/CD, for Profinet. You are also right in that a Profibus or Profinet message must be sent from one start bit to the last stop bit. Where you are wtrong is in how the Profibus/Profinet message is constructed, especially when a Profisafe frame is inserted... Have a look at the following presentation, by PI, the standards group for Profibus and Profinet. https://www.slideshare.net/ProfibusUK/prof-isafe-and-trends-pete-Brown This particular slide will show you that the Profisafe message is integrated as part of the Profinet (in this case) frame, so when the Profinet message is transmitted the Profisafe elements are also sent. See the attachment below. Hope this helps, Daniel Chartier |
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