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MPI problems

Created by: ahmedmae94 at: 12/22/2009 1:55 PM (9 Replies)

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12/22/2009 1:55 PM	Rate (0)
ahmedmae94 Posts: 103 Rating: (11)	How are you all , I need to connect my PC to 2 X (CPU 317 2DP) , to make smallMPI network to test something. I have USB adapter <<6ES7972-0CB20-0XA0>> I have made all required steps to implement this network , the pictures in the attachment show that . in PC/PG interface : when I start network detection , SIMATIC detect MPI network but when I make Display accessable node , SIMATIC DetectONE PLC ONLY with MPI=2!!!!! another problem : when I was trying to download <<SIMATIC 300(2)>> , SIMATIC MANAGER display error message to me , 'also in the attachment' please help me to solve this problems hint:- I have tried in two cases , PC is only master on the bus selected / not selected I know this is a petty problem but I'm beginner in networking thanks in advance Attachment MPI.zip (174 Downloads)
ahmedmae94 Posts: 103 Rating: (11)
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12/22/2009 3:05 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (1000)	First thing: Take care, that both PLC got different MPI - Adresses! There must not be the same adress at the bus more than one time. Also, the adress from your MPI-Adapter must be different!
IBN-Service Posts: 8946 Rating: (1000)
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12/22/2009 3:32 PM	Rate (0)
ahmedmae94 Posts: 103 Rating: (11)	yes, sir the print screen pictures in the attachment describe that I have assigned address 0 to PC address 2 to 1st PLC address3 to2ndPLC please i need to solve this problem as fast aswe can thanks
ahmedmae94 Posts: 103 Rating: (11)
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12/22/2009 3:40 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (1000)	ahmedmae94 yes, sir the print screen pictures in the attachment describe that I have assigned address 0 to PC address 2 to 1st PLC address3 to2ndPLC please i need to solve this problem as fast aswe can thanks OK, Next thing: Do you load the HW-Konfig into the CPU one by one, that means before you connect them together with the MPI-cable? Can you find the CPU 2 and 3 separately?
IBN-Service Posts: 8946 Rating: (1000)
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12/22/2009 3:42 PM	Rate (1)
Ammy Platinum Member Joined: 4/19/2008 Last visit: 11/21/2024 Posts: 1525 Rating: (159)	ahmedmae94 yes, sir the print screen pictures in the attachment describe that I have assigned address 0 to PC address 2 to 1st PLC address3 to2ndPLC Hi amedmae94, do the followingsteps, if your PLC on network as you given in your attachment then Switch of the one of the PLC & Download the Hardware in other PLC, & visa versa, the ON the both the PLC & checked in Accesible Node. if you still face problem then Checked your Profibus Cable Terminating Register. if you able to download one by one on same network then your Cable is working OK.
	Ammy New for every one.............. “No duty is more urgent than that of returning thanks.” If Problem Solved......! I can't help you privately - please post in the Forums
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12/22/2009 5:29 PM	Rate (0)
ahmedmae94 Posts: 103 Rating: (11)	thank IBN-service & ammy I use your suggestion to make special test ---I connect 1st CPU & disconnect the 2nd CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed ---I connect 2nd CPU & disconnect the 1st CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed this means that SIMATIC 300(2) has something error so I upload the SW to take alook at it hint:- if there is any thing wrong with the resistor there is red lamp on CPU turned on, but I think the resistor positions is true. many many thanks for your replies Attachment Network.zip (162 Downloads)
ahmedmae94 Posts: 103 Rating: (11)
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12/22/2009 6:08 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (1000)	ahmedmae94 thank IBN-service & ammy I use your suggestion to make special test ---I connect 1st CPU & disconnect the 2nd CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed ---I connect 2nd CPU & disconnect the 1st CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed this means that SIMATIC 300(2) has something error so I upload the SW to take alook at it hint:- if there is any thing wrong with the resistor there is red lamp on CPU turned on, but I think the resistor positions is true. many many thanks for your replies My friend, are you shure, that you load the correctly HW - configuration in the correct cpu? It sounds a little bit like you always load the CPU1 - Station to both PLC. When you connect ONLY CPU 2 (MPI 3), the Step7 will ask you for the right station number. Because in your project the CPU has adress MPI 3, but the (new) CPU 2 has the default MPI - Adress, which is 2. So you must say "show all" and the select the MPI Adress 2(!) AFTER the download, than the adress is MPI 3! Again: New CPUhas always the MPI Adress 2 (it is default). Only after first download of hardware-configuration, the adress will change to the adress that is selected inside the configuration of your station!
IBN-Service Posts: 8946 Rating: (1000)	Last edited by: IBN-Service at: 12/22/2009 6:09 PM
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12/23/2009 8:39 AM	Rate (1)
Ayman Elotaify Platinum Member Joined: 5/28/2008 Last visit: 4/26/2025 Posts: 4520 Rating: (843)	Dear ahmedmae94, ahmedmae94 I use your suggestion to make special test ---I connect 1st CPU & disconnect the 2nd CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed This means that you have assigned MPI address: 2 for 1st CPU. ahmedmae94 ---I connect 2nd CPU & disconnect the 1st CPU I tried to download SIMATIC 300(1) , I succeed I tried to download SIMATIC 300(2) , I failed This means that you have assigned MPI address: 2 for2nd CPU. _______________ Then you can not build the network in this configuration. Each CPU should have a unique MPI address on the network. Keep the 1st CPU as is (MPI address = 2), and try to download HW config. the the 2nd CPU with MPI address 3. You can try it while the CPU is connected alone with the PC and also try it while the CPU is in stop mode. To conclude. Swith 2nd CPU to stop mode. Connect PC to this CPU via PC adapter. Download a HW configuration to 2nd CPU with MPI address =3) After the previous step, you can connect the MPI cable using profibus sockets as mentioed in your first post and taking into consideration the settings of the termination resistor. Then if you connected your PC to any of the CPUs, and try to download any software, a pop-up window will ask you which CPU you want to download to. Regards,
	Last edited by: Ayman Elotaify at: 12/23/2009 8:41 AM Ayman Elotaify
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This contribution was helpful to 2 thankful Users how come ahmedmae94

12/23/2009 12:02 PM	Rate (0)
ahmedmae94 Posts: 103 Rating: (11)	many thanks for IBN-Service many many thanks Ayman Elotaify , I'm egyptian like you , I execute your steps , I succeed to configure network , I succeed to transfer data between 2CPUs using global data. many thanks for all SIEMENS forum members
ahmedmae94 Posts: 103 Rating: (11)
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12/23/2009 12:19 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	ahmedmae94 many thanks for IBN-Service many many thanks Ayman Elotaify , I'm egyptian like you... Sorry, I am not egyptian, I am GERMAN. But does that realy matters? A last hint for you: Have a look at SFC67 "X_GET" for MPI - communication also. It is very easy to use but mutch more comfortable than global data. Nice X-mas!
IBN-Service Posts: 8946 Rating: (1000)	Last edited by: IBN-Service at: 12/23/2009 12:24 PM
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