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comunication between CPU317 2PN/DP and CPU315 with CP343-1

Created by: smonges at: 7/25/2011 8:18 AM (14 Replies)

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7/25/2011 8:18 AM	Rate (0)
smonges Posts: 12 Rating: (0)	Hello, We are trying to set communication between a CPU 317 2PN/DP and a CPU315 2PN/DP, using a CP343-1 in the CPU315. We want to be able to read/write bits datas, integers and reals (for example speed references, tank levels...) Please find attached the program and configuration we have tried, but it seems is not working. On the net we have not found any example with communication between one CPU and one CP. Which type of communication? can we connect both CPU and CP through a switch? if we connect directly, is a crossed cable necessary? Many thanks for your help. Attachment Bcn_test_COM.zip (283 Downloads)
smonges Posts: 12 Rating: (0)
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7/25/2011 9:00 AM	Rate (0)
umencho Diamond Expert Joined: 3/21/2006 Last visit: 3/19/2025 Posts: 10239 Rating: (1183)	smonges Hello, We are trying to set communication between a CPU 317 2PN/DP and a CPU315 2PN/DP, using a CP343-1 in the CPU315. We want to be able to read/write bits datas, integers and reals (for example speed references, tank levels...) Please find attached the program and configuration we have tried, but it seems is not working. On the net we have not found any example with communication between one CPU and one CP. Which type of communication? can we connect both CPU and CP through a switch? if we connect directly, is a crossed cable necessary? Many thanks for your help. Hello, At the moment I don't have a Step7 in order to check your project. Yes, you can use a switch. And yes, you will need a crossed cable in case of directly connection. But is possible to use a straight cable: jklm ... The CP343-1EX30 supports autocrossing: Autocrossing mechanism The automatic setting also includes an “autocrossing” mechanism. With autocrossing, you can connect network components and end devices using either crossover or straight-through cables. I checked for new CPUs. The PN ports support autocrossing as well. Best regards jklm Take a look at http://support.automation.siemens.com/WW/view/en/25209116 Best regards, Hristo Mihalev
	Last edited by: UMENCHO at: 7/25/2011 9:58 AM Added jklm''s note!
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7/25/2011 9:47 AM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, It is possible to configure an S7 connection between the 317-PN and the CP343-1EX30, exactly the way you did in your project. Over an S7 connection, you can run the functions PUT (=write to a destination in the remote CPU), GET (= Read a source from the remote CPU), and further blocks like BSEND/BRECV, USEND/URCV, ... For S7 connections, there is no major difference in programming using a CP or not. Except that inPLC with the CP you must use the library for CPs, where in the CPU without CP you use the communication blocks of the standard library.
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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7/25/2011 11:49 AM	Rate (0)
smonges Posts: 12 Rating: (0)	Thanks for your help. We have tried with the Open Communication Wizard, but we can only configure CPU and not CP.
smonges Posts: 12 Rating: (0)
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7/25/2011 11:56 AM	Rate (0)
smonges Posts: 12 Rating: (0)	Thanks for your help and time. If I understand well, the configuration we have made in the project should work? Is it necessary to make the configuration in both CPU? or can we only make it in one? and thus in this case there is only one CPU making the data writing and reading from the other partner, in our case the CP? The program we sent doesn´t not work. Can the problem be the cable? the connection is a straight cable directly between the CPU and the CP. Hopefully, today we´ll make the connection with straight cables via a switch. When we check online the S7 connection from the NetPro, it is in red colour, saying "connection is being configurated". Thanks again
smonges Posts: 12 Rating: (0)
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7/25/2011 1:53 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hi smonges, you have to configure this connection on both sides. The Open Communication Wizard is working for CPUs, but unfortunately not for the side with the CP. Therefore you have to use FC5/FC6 on the side of the CP. I found a FAQ for using FC5/FC6, this may help you: http://support.automation.siemens.com/WW/view/en/17853532 Regards, Rated X
Rated X Posts: 1547 Rating: (129)
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7/25/2011 2:57 PM	Rate (0)
umencho Diamond Expert Joined: 3/21/2006 Last visit: 3/19/2025 Posts: 10239 Rating: (1183)	smonges ... When we check online the S7 connection from the NetPro, it is in red colour, saying "connection is being configurated". Thanks again This is a normal behavior there. Even in case of "healthy" communication there is a red square. Because you are using sample project from there http://support.automation.siemens.com/WW/view/en/18516182 how did you understand that the exchanging of data is not working? You didn't "built" the logic in CP side. Make the same like in CPU side, just use a function blocks FB12 "BSEND" and FB13 "BRCV" from the "SIMATIC_NET_CP" library under "CP 300 > Blocks". Best regards, Hristo Mihalev

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7/25/2011 5:33 PM	Rate (0)
smonges Posts: 12 Rating: (0)	Hi, Before going further with communication blocks, how can I check the good configuration of NetPro? Is it possible to check healthy S7 connection? We have tried direct straight cable between the CPU and CP, direct crossed cable between CPU and CP, and connection via a switch. I understand there are 2 steps: - the NetPro configuration, to be done on both sides - the communication blocks, which have to be also on both sides, FB12 and FB13 from standard cpu library, and FB12 and FB13 from cp library For the NetPro, FOR THE S7 connection, we set both local ID and partner ID to 1. For the communication blocks, we use same as example (OB1 and OB100): In FB100, we define: FB12 fromlocal side using DB200, and FB12 from partner side usign DB201. FB13 from local side using DB201, and FB13 from partner side using DB200. It doesn´t seem to be too difficult, but we are not able to make sure the S7 connection is OK
smonges Posts: 12 Rating: (0)
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7/26/2011 8:53 AM	Rate (0)
umencho Diamond Expert Joined: 3/21/2006 Last visit: 3/19/2025 Posts: 10239 Rating: (1183)	Make the logic in both CPUs and then check in corresponding DBs...This is the way. Of course you should be sure in connection cable between both partners. I don't think there is a problem. Best regards, Hristo MIhalev

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7/26/2011 11:38 AM	Rate (0)
leonwang11 Regular Member Joined: 5/1/2011 Last visit: 4/26/2024 Posts: 19 Rating: (0)	Hello, You may try the steps stated in attached. I think you have not finished your port connection. Then you canuse 'AG_SEND'-FC5 and 'AG_RECV'-FC6 to program. one CPU use FC5 and another one use FC6. Good Luck! Leon Attachment Your port configuration is not done.zip (271 Downloads)

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