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Created by: Ugljesa at: 12/31/2013 8:03 AM (5 Replies)

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12/31/2013 8:03 AM	Rate (0)
Ugljesa Bronze Member Joined: 10/29/2012 Last visit: 10/18/2024 Posts: 102 Rating: (1)	Dear users and experts, Is it possible to transfer data from WinCC professional to PLC ( for eg. S7 300)? To make question clear, let say that we have Sentron Pac 4200 and that we connected that device to WinCC Pro. using Modicon Modbus TCP/IP protocol. If I want to send data from WinCC (eg. current, voltage, power) into PLC to make some control, how can I do that? I think that one way is over OPC server, but honestly I've never worked with that. Thank you all in advance and happy New yea.r

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1/2/2014 10:28 AM	Rate (0)
uel123 Gold Member Joined: 1/29/2006 Last visit: 1/24/2025 Posts: 449 Rating: (65)	Hi, Ugljesa! For that task, I would simply create some new S7-300 tags (classical, no need for OPC) and then write values of those new tags in SCADA (f.e. with C or VBS). Have fun! uel123.

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This contribution was helpful to 1 thankful Users Ugljesa

1/2/2014 5:03 PM	Rate (0)
Ugljesa Bronze Member Joined: 10/29/2012 Last visit: 10/18/2024 Posts: 102 Rating: (1)	Can you show me the code for doing that?

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1/3/2014 9:49 AM	Rate (1)
uel123 Gold Member Joined: 1/29/2006 Last visit: 1/24/2025 Posts: 449 Rating: (65)	Hi! Very simple example, in C scripting: void CFunction_1() { float tag_1; // temporary float tag // at first, you should read a tag value, that you want to transfer to your PLC: tag_1 = GetTagFloat ("MyTag_read_from_Sentron"); // now you simply write this to your S7-300 tag, which is a normal WinCC tag, //allready defined! SetTagFloat ("My_S7_300_tag",tag_1); } - first, you have to definea new tag (My_S7_300_tag), with normal tag creation procedure; - then you add new function in C script, as mentioned above - at the end, you add a new Scheduled task, with a trigger f.e.1s; - in this new sceduled task, at Properties ->Events add this new function. The result of this is: - every second (in RT) the value of tag "MyTag_read_from_Sentron" will be copied to "My_S7_300_tag". Have fun! uel123.
	Last edited by: uel123 at: 1/3/2014 9:51 AM editing line breaks...
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This contribution was helpful to 1 thankful Users Tomy Master

1/3/2014 2:19 PM	Rate (0)
Ugljesa Bronze Member Joined: 10/29/2012 Last visit: 10/18/2024 Posts: 102 Rating: (1)	Thank you sir. Your answer was more than a helpfull.

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This contribution was helpful to 1 thankful Users S_Moderator

1/3/2014 3:02 PM	Rate (0)
uel123 Gold Member Joined: 1/29/2006 Last visit: 1/24/2025 Posts: 449 Rating: (65)	! uel123.

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