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Communications of 400H, CP LED flash frequency !!

Created by: AnproScott at: 1/15/2008 10:32 AM (9 Replies)

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1/15/2008 10:32 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	My men： I have a 400H system and Ethernet connections follwing： built 18 connections for Rack0 to 300 CPUs(clock req to send is 1.6 seconds in period) and built 18 connections for Rack1 to 300 CPUs(clock req to send is 1.6 seconds in period) My trouble is that：Whatever MSTR is switched to Rack0 or Rack1, The CP 443-1 on Rack1,LEDs(T×D、R×D) flash frequency are always looks much slower than LEDs of the CP443-1 on Rack0. So 1.Anyone knows what causes the situation? 2.Anyone met this problem and how to solve this problem? File Attachment. Attachment 400H_PICTURES.zip (429 Downloads)
	Last edited by: SexDriver at: 16.01.2008 07:11
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1/16/2008 3:24 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	Hi, exports, where are you?? Is there anybody know how to solve this problem? It's rush to solve this problem, please help me! Because the transmission rate differnetbetween CPs of Rack0 and Rack1 isnotallowed forour client. Attachment Connections.zip (395 Downloads)
	Last edited by: SexDriver at: 16.01.2008 04:24
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1/16/2008 9:48 PM	Rate (0)
Late Platinum Expert Joined: 1/7/2006 Last visit: 11/17/2023 Posts: 2705 Rating: (318)	Hi, The H-System is deciding for it self how to do the load... Is there any trouble with the communication itself ? Normally the first setup connections are on a certain CP and stays there until that is not working anymore. You may switch off the power ofthesystem where the CP-LED are blinking faster then the other one. Wait a 30 seconds until all the connections are to the other CP and then switch on the other PS again. What happens then ?
	I hope that the answer will help, if you have still questions, don't hesitate to ask me. All the best, Late Never say never, think in solutions, not in trouble......
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1/18/2008 3:34 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	Hi, My man : The redundancy function is OK. After thefollowing situation switching, the Ethernet communicationis no problem, the communication functionis ok.The communication switching is decided by MSTR system bit : 1. MSTR switch from Rack 0 to Rack 1 2. MSTR switch from Rack1 to Rack 0 But my client is so confused and curious abuot that : No matter the MSTR is in Rack 0 or Rack 1,the TxD/RxD LEDsof CP in Rack 1 are always blinkingin slower speedthan the CP's LEDsin Rack 0, and the transmission(Send/Receive data)speed isalso slower. Andmy clientis a little unsatisfiedwith the result, I don'tknow how to convince him. Thanks for your reply.
	Last edited by: SexDriver at: 18.01.2008 03:43 Last edited by: SexDriver at: 18.01.2008 03:43
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1/20/2008 12:02 AM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Dear Sexdriver, you mentioned that the frequency the data is send is 1,6 Seconds... right? So I wonder as you use about 10 ISO on TCP Connections and 7 to 8 S7-Connections and you said that the Communication seems to be fine... what type of Telegramms (amounts) do you expect on each communication and how does the communication on the wire look like? Can you do any monitoring with a tool like Wireshark? Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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1/24/2008 3:04 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	Hi, my man: 1.The telegrams of one ISO on TCPConnectionare 240 bytes. ,The telegrams of one S7-Connectionare 100bytes. 2.I didn't do any monitoring with a tool, I just set counters etc.to receive NDR/DONE bit pulses to watch the communication situation. Thanks for your reply. J_Bell Dear Sexdriver, you mentioned that the frequency the data is send is 1,6 Seconds... right? So I wonder as you use about 10 ISO on TCP Connections and 7 to 8 S7-Connections and you said that the Communication seems to be fine... what type of Telegramms (amounts) do you expect on each communication and how does the communication on the wire look like? Can you do any monitoring with a tool like Wireshark? Best regards J_Bell
	Last edited by: SexDriver at: 24.01.2008 03:06
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1/25/2008 12:16 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Dear SexDriver, what I would do is checking if the AG_SEND / AG_RECV Functions used in the Rack 1 System show any problems or faults in the process... maybe you can add some lines to the program to see if the Communication takes more time in this rack than in the first one. As the SEND/RECEIVE Communication is not made for the Redundant system it may be a problem.. but it should work if you have configured S/R Connections on each single System... but be aware that you need two Connections for each S7-300 than. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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1/28/2008 4:13 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	Hi,my man: Yeah,my 400Hhas two Connections for each S7-300 ,is this the only way? Are there any morepossibleways to do the CP443 of 400H communicationswitching ? . J_Bell Dear SexDriver, what I would do is checking if the AG_SEND / AG_RECV Functions used in the Rack 1 System show any problems or faults in the process... maybe you can add some lines to the program to see if the Communication takes more time in this rack than in the first one. As the SEND/RECEIVE Communication is not made for the Redundant system it may be a problem.. but it should work if you have configured S/R Connections on each single System... but be aware that you need two Connections for each S7-300 than. Best regards J_Bell
	Last edited by: SexDriver at: 28.01.2008 04:15
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1/28/2008 8:53 AM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello SexDriver, well... the only way of doing automatic redundant Communication is by using S7-H-Communication. In this case you may use other S7-H Systems or PCs with redundancy Software as communicationpartners... S7-300 will not work with S7-H-Connections. The only other way would be to use Send / Receive Connections the way you use them... but I would be very carefully in this because you will have to care about the Connections on both sides. So the S7-300 has to care which Connection is used right now... an the S7-400 has to care if the Communcationpartner is responding on the Connection the S7-400 is triing to send about. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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1/31/2008 2:58 AM	Rate (0)
AnproScott Advanced Member Joined: 5/31/2007 Last visit: 9/18/2024 Posts: 90 Rating: (2)	My man: 1. Yeah, Iknow what yousaid about S7-H-communication. In normally, the S7-H-communication is used for automatic redundancy Communication to SCADA like WinCC or iFix ,right? 2. Yeah, you are definitely right. I think the way is really complex and to make mistakes easily if you are not carefully enough, eapecially when the connection numbers are large! By the way, this configuration is not designed by me, so I know this configuration at first time. 3. Thanks foryour opinion and reply. J_Bell Hello SexDriver, well... the only way of doing automatic redundant Communication is by using S7-H-Communication. In this case you may use other S7-H Systems or PCs with redundancy Software as communicationpartners... S7-300 will not work with S7-H-Connections. The only other way would be to use Send / Receive Connections the way you use them... but I would be very carefully in this because you will have to care about the Connections on both sides. So the S7-300 has to care which Connection is used right now... an the S7-400 has to care if the Communcationpartner is responding on the Connection the S7-400 is triing to send about. Best regards J_Bell

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