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BSEND and BRCV Ethernet Comm Help !

Created by: Denker at: 10/2/2014 1:03 AM (9 Replies)

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10/2/2014 1:03 AM	Rate (0)
Denker Posts: 90 Rating: (0)	Hi. I'm trying to communicate between two S7-300 with S7 connections in Ethernet using BSEND and BRCV blocks, but with no success. I'm simulation with PLCSIM. Can someone help me to find my mistake, please ? The project is attached. Greetings. Attachment S7_pro_1.zip (96 Downloads)
Denker Posts: 90 Rating: (0)
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10/2/2014 10:14 AM	Rate (0)
Kampi Posts: 366 Rating: (30)	Hi, you had there a big problem: your local and partner ID were the same -> this cannot work. I gave CPU315 ID 1 and CPU317 ID 2 and corrected it in FC10 CALL. I also used in both projects SFB12,13. Please try with project in attachment! nice regards Attachment S7_pro_1_new.zip (122 Downloads)
Kampi Posts: 366 Rating: (30)
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10/2/2014 11:54 PM	Rate (0)
Denker Posts: 90 Rating: (0)	Kampi Hi, you had there a big problem: your local and partner ID were the same -> this cannot work. I gave CPU315 ID 1 and CPU317 ID 2 and corrected it in FC10 CALL. I also used in both projects SFB12,13. Please try with project in attachment! nice regards Hi Kampi. No success with the project attached... Are you sure that the ID must be different in both CPUs ? I ask that because the answer ofUMENCHOin the following topic: Two S7-300 PN/DP connected via Ethernet using S7-connection Please, I need help about it !! regards.
Denker Posts: 90 Rating: (0)
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10/3/2014 10:52 AM	Rate (0)
Kampi Posts: 366 Rating: (30)	Hi ok when there are two cpu's it works with different ID's AND with same ID's but when there are more S7-Connenctions you have to use different ID's. I have here another FAQ which you can use: http://support.automation.siemens.com/WW/view/en/38726592 I think you have any issue in projection PLCSIM because on my system the project works fine! nice regards
Kampi Posts: 366 Rating: (30)
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This contribution was helpful to 1 thankful Users Denker

10/3/2014 11:57 PM	Rate (0)
Denker Posts: 90 Rating: (0)	Kampi Hi ok when there are two cpu's it works with different ID's AND with same ID's but when there are more S7-Connenctions you have to use different ID's. I have here another FAQ which you can use: http://support.automation.siemens.com/WW/view/en/38726592 I think you have any issue in projection PLCSIM because on my system the project works fine! nice regards Hi Kampi. Now it works with same ID for both CPUs. I think the problem was in PLCSim installation... Thanks for the help ! best regards.
Denker Posts: 90 Rating: (0)
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10/5/2014 10:33 AM	Rate (0)
VVago Posts: 784 Rating: (52)	Hello Experts, Kindly explain how it works withsame ID's and also with different ID's for both CPUs? Best regards..........
VVago Posts: 784 Rating: (52)
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10/6/2014 4:45 AM	Rate (0)
Denker Posts: 90 Rating: (0)	Wago Hello Experts, Kindly explain how it works withsame ID's and also with different ID's for both CPUs? Best regards.......... Hi Wago. I did a test using 04 CPUs in Ethernet with PLCSim and it works perfectly. Using different ID for two CPU it doens't work for me... Using as follows it works. S7 connection 01: - CPU 01 (ID: 1; R_ID Send: 1, R_ID Receive: 2) - CPU 02 (ID: 1; R_ID Send: 2, R_ID Receive: 1) S7 connection 02: - CPU 03 (ID: 2; R_ID Send: 1, R_ID Receive: 2) - CPU 04 (ID: 2; R_ID Send: 2, R_ID Receive: 1) best regards.
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10/6/2014 9:13 AM	Rate (0)
Kampi Posts: 366 Rating: (30)	Hello, I cannot explain how it works but for my logical understanding, why should it not work? When I use the projected ID's in the Program on the B_SEND and B_RCV input? nice regards
Kampi Posts: 366 Rating: (30)
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10/6/2014 10:10 AM	Rate (0)
VVago Posts: 784 Rating: (52)	Wago Hello Experts, Kindly explain how it works withsame ID's and also with different ID's for both CPUs? Best regards.......... We are waiting your reply to explain this point.
VVago Posts: 784 Rating: (52)
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10/6/2014 10:23 AM	Rate (0)
Kampi Posts: 366 Rating: (30)	And again: I cannot explain why it works because I'm not the programmer who wrote the Siemens software.. I just can say that I have tried it and it works..
Kampi Posts: 366 Rating: (30)
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