7/4/2013 8:29 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi JoeGrib, and do not forget that the number of BYTE for the exchange between the two masters must be the same. |
7/4/2013 8:45 AM | |
Joined: 3/21/2006 Last visit: 9/10/2024 Posts: 10228 Rating: (1181) |
OFT I would transfer the data in DINT instead of REAL.
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7/4/2013 8:52 AM | |
Joined: 9/16/2011 Last visit: 6/20/2024 Posts: 291 Rating: (6) |
DearUMENCHO, Why DINT, not REAL ? both will occupy 4 bytes...........
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Reg, |
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7/4/2013 9:11 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hello UMENCHO, Have a look: DP/DP Coupler The data is sent in BYTE, so there is no problem. |
7/4/2013 2:42 PM | |
Posts: 6 Rating: (0) |
word type has 2 bytes length? |
7/4/2013 2:47 PM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi J86Obalhe, 8 BIT -> 1 BYTE 1 WORD -> 2 BYTE 1 DWORD -> 4 BYTE 1 REAL -> 4 BYTE |
7/4/2013 11:00 PM | |
Joined: 9/27/2006 Last visit: 9/23/2024 Posts: 12282 Rating: (2685) |
Hello Joe; How are you setting up your network? You state you have 6 DP/DP Couplers, but you always speak of only one master. Since a DP/DP Coupler is used to connect 2 DPmaster in order to exchange data, you would need at least6 more masters in that network... Look at the example attached (frogive the plain drawing) and tell us if the networek you have lokks anything like it. If not, please give us a sketch of your own topology. I do not believe that speed could be an issue. Speeds supported by the DP/DP coupler go up to 12 MB (see appendix A2 from the manual suggested earlier), and it is staed in the following FAQ that both masters do not have to be operating at the same bus speed: From this FAQ: Mixed mode on the DP/DP coupler This mixed mode is possible, because the DP/DP coupler has two PROFIBUS interfaces that work independently of each other and which can also differ in their baud rates among other things. |
7/5/2013 5:23 AM | |
Joined: 3/21/2006 Last visit: 9/10/2024 Posts: 10228 Rating: (1181) |
1. Configuration of DP/DP Coupler must matched on each two pairs Masters and must be downloaded. 2. Check the Profibus addresses. How they are assigned?(DP/DP Couplermanual)
3. What are the state of DP/DP Coupler leds? Are there a SF and BF1/BF2 ON? |
Last edited by: UMENCHO at: 7/5/2013 5:27 AM |
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7/5/2013 8:42 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi JoeGrib, Send us your configuration of the station and how they are or want to connect. |
7/5/2013 3:12 PM | |
Posts: 26 Rating: (1) |
This is the HW Config for the 300. I'm going to have to download the ET200s separately because of the size of the projects Hope this clears up any questions. Thanks again for all the help. Hope this edit clarifies my intentions. I'm currently setting up the 3rd profibus network in this configuration. The one with 6 DP/DP Couplers. The 1st and 2nd networks (with 9 and 8 DP/DP Couplers, respectively) are not yet configured, but I'll be doing more or less the same thing with them over the next week.
Attachment300_2.zip (251 Downloads) |
Last edited by: JoeGrib at: 7/5/2013 3:44 PM |
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7/5/2013 3:13 PM | |
Posts: 26 Rating: (1) |
ET200s HW Config
Attachmentet200s.zip (153 Downloads) |
7/5/2013 3:35 PM | |
Joined: 3/21/2006 Last visit: 9/10/2024 Posts: 10228 Rating: (1181) |
In S7-300 there are too many DP/DP Couplers. The transitions of data will be in one direction only (according hardware configuration). S7-300 PLC will "read the outpus" from 200S. In CPU 300 the data will be read by CP using using FC2 (RCV) and after look there how the CPU will "understand" received data.http://support.automation.siemens.com/WW/view/en/18208090 The initial point is - download the corresponding hardware configurations in all CPUs. There should not have SF and BF. Best regards, Hristo Mihalev
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This contribution was helpful to1 thankful Users |
7/5/2013 6:07 PM | |
Posts: 26 Rating: (1) |
Thank you to everyone for all the advice. The network is up and running. Joe
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This contribution was helpful to4 thankful Users |
8/2/2013 12:31 PM | |
Joined: 4/24/2009 Last visit: 8/20/2024 Posts: 2682 Rating: (135) |
New question was splitted to exchange real data type using DP/DP coupler with ABB dc Best regards O_Moderator |
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