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1/22/2013 12:16 PM | |
Joined: 9/27/2006 Last visit: 9/23/2024 Posts: 12282 Rating: (2685)
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Hello ahsan; You cannot use the integrated Profibus port of the CPU to communicate with Modbus RTU RS-485protocol to your energy meter. Please have a look at my reply to this thread started a few days ago for more information. /tf/WW/en/Posts/85747#top Hope this helps, Daniel Chartier |
1/22/2013 12:40 PM | |
Posts: 8 Rating: (0) |
Hai dchartier Tank you, This is good one to me also.
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1/22/2013 1:10 PM | |
Joined: 9/27/2006 Last visit: 9/23/2024 Posts: 12282 Rating: (2685)
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Hello Ahsan, Chessmaster; I would like to point out one detail for Chessmaster's proposed solution. First to program the S7-200 you need a seperate software, Microwin, and a seperate programming cable, a PPI adapter (can be USB-PPI now). But, in addition,to install Modbus libraries in Microwin you need an add-on package, to be purchased separately: How do you implement MODBUS communication with S7-200? Hope this helps, Daniel Chartier |
1/22/2013 1:18 PM | |
Posts: 84 Rating: (1) |
Thanks for complementary explanation. Regards
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1/23/2013 7:11 AM | |
Posts: 119 Rating: (1) |
Thanks both of you. S7-200 is definately a cheaper way, but I need to communicate it with S7-300 . And now I must follow dchartier link for this purpose.I will tell you if I need any further help. |
1/23/2013 4:59 PM | |
Joined: 9/27/2006 Last visit: 9/23/2024 Posts: 12282 Rating: (2685) |
Hello ahsan; Wre you planning to use Modbus RTU communicatiosn between the S7-200 and S7-300? Or do you need an additional connection between the 2 PLCs? You could setup your S7-200 as a Modbus master to collect the data from your Modbus slaves, and use an MPI connection to communicate the data to the S7-300; have a look at the following FAQ: How does data communication work between S7-300/S7- 400 and S7-200 via MPI using S7 basic communication? Note that to do this you would need a s7-200 CPU with 2 integrated ports(CPU 226). Here is one model: 6ES7216-2AD22-0XB0 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 1/23/2013 5:04 PM |
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