5/30/2009 6:40 AM | |
Joined: 9/9/2007 Last visit: 8/12/2021 Posts: 27 Rating: (0) |
Dear all I have a problem with PROFIBUS communication by CP342-5 with order number 6GK7 342-5DA02-0XEO. As you see in attached file I have a S7-300station with one PS307, CPU 315-2DP, Cp342-5 and CP343-1 and there are 9 DP slaves connected to CP342-5 that slave have 42 byte of I/O. I used FC1 and FC2 (DP_SEND & DP_RECV) for communicating with these slaves. In the online help of the FCs I found that the limitation of data transferring is 240 byte and sum of my configured I/O slave bytes are 378 bytes. Is it any way to have communication with all of these slaves by using one FC? I mean I am looking for a way to communicating with all salves together. AttachmentCONFIG.pdf (160 Downloads) |
5/30/2009 10:10 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309) |
Hello, Have a look to this manual: http://support.automation.siemens.com/WW/view/en/30564821 At page 137 and 142, you will see that the length is 240 bytes for a slave, but for a master the total length can be 2160 bytes. So I do not expect a problem with less than 400 bytes. |
Best regards |
|
6/1/2009 12:03 PM | |
Joined: 9/9/2007 Last visit: 8/12/2021 Posts: 27 Rating: (0) |
Dear dchartier please find the attached file via below link(610 KB). This is my program archive and you can find all information about address ranges. as I wrote in may last post at the moment that I set the data length to 240 byte, all thing was good but by increasing the data length to a number more than 240 the FC2(DP_RECV) stop the working an shows error code 8180 HEX. Please note that bye data length 240 byte approximately 17 slaves are accessible not more. Best regards http://rapidshare.com/files/239539983/Profibus-CP342-5.zip |
6/3/2009 7:36 PM | |
Joined: 9/9/2007 Last visit: 8/12/2021 Posts: 27 Rating: (0) |
Dear Hulzhex I checked version of FC. It is v3.0 and it seems ok Regards |
Follow us on