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Is there a way to extract the PLC Tags directly from the 1214C PLC without using the TIA portal?

Created by: flcorbin at: 1/30/2014 9:01 PM (5 Replies)

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1/30/2014 9:01 PM	Rate (0)
flcorbin Regular Member Joined: 10/19/2010 Last visit: 12/16/2015 Posts: 13 Rating: (0)	Hi all! Here's my question: Is there a way to extract the PLC Tags directly from the 1214C PLC without using the TIA portal? We would like to do a dynamic server to read and write values from/to our PLC with our system PC that could read, if possible, the PLC Tags in the PLC via Ethernet and then have a kind of Watch Table usng the PLC tags. All this without using the TIA Portal. Anyone have already done something similar? Thanks for any inputs.

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1/30/2014 9:20 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/5/2021 Posts: 10212 Rating: (1699)	flcorbin Hi all! Here's my question: Is there a way to extract the PLC Tags directly from the 1214C PLC without using the TIA portal? We would like to do a dynamic server to read and write values from/to our PLC with our system PC that could read, if possible, the PLC Tags in the PLC via Ethernet and then have a kind of Watch Table usng the PLC tags. All this without using the TIA Portal. Anyone have already done something similar? Thanks for any inputs. Sounds like you want OPC server, or the Siemens Simatic.NET package. There are other options. You could simply enable the plc internal web server, and connect to it via browser. Once the data is in the browser, you could also create a custom user web page with just the values you want to display. If you are looking for a custom app, there is a sourceforge.net s7 library, I think it's called snap7. It may also help solve the problem. Are you trying to reverse engineer something without the original source code or trying to get into the plc with a password protection?
	science guy
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1/30/2014 11:08 PM	Rate (0)
flcorbin Regular Member Joined: 10/19/2010 Last visit: 12/16/2015 Posts: 13 Rating: (0)	huggy_d1 Sounds like you want OPC server, or the Siemens Simatic.NET package. There are other options. You could simply enable the plc internal web server, and connect to it via browser. Once the data is in the browser, you could also create a custom user web page with just the values you want to display. If you are looking for a custom app, there is a sourceforge.net s7 library, I think it's called snap7. It may also help solve the problem. Are you trying to reverse engineer something without the original source code or trying to get into the plc with a password protection? Thanks for your quick answer. I may have not enough clear. We want to be able to make an interface between our PLCs (which we develop for our products) and our PC since a lot of the HMI-like functions are made by a PC and moreover the calc intensive math required for our application are run in a PC. Thus, even if we sometime used a web page, it's more just like debug mode, since it's kind of inefficient to display all the data to a web server to then read/write them back to our software. So what we would want is a library or a software that could interface easily our PC and PLCs in our system in order to efficiently used both (we exchange a lot of datat between the two). Roughly, it should like if I put a Siemens PLC and a Siemens HMI in a TIA project and both could share data as will. So yes kind like any OPC server. We currently use libnodav libraryas our software developping team code in Delphi (don't ask me why!)but it seem not enough to do everything we wish. It would best if we could extract both the tatgs name and the value from the PLC itself, instead of making sure all the tags and software variables are in sync at every release. So we taught of developping our own server, but was wondering if it was possible to read back all the tags from the PLC. But this may not be the best solution as there is probably a perfect product out there that do eveyrtinh that we require. So, I'll take a look at Snap7 and other OPC Server. Do you have any other insight on software availbale that could meets our needs? Thanks for your help!
	Last edited by: flcorbin at: 1/31/2014 3:12 PM
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2/3/2014 9:11 PM	Rate (0)
flcorbin Regular Member Joined: 10/19/2010 Last visit: 12/16/2015 Posts: 13 Rating: (0)	So after checking all this, eitheir with Libnodav library or Snap7, that we can extract the PLC tags names. If any one have done something like I need (extracting the PCL Tags), please let me know. For now, we'll stick to exporting the PLC Tags manually from the TIA software and then parsing it for the PC client. Thanks.
	Last edited by: flcorbin at: 2/3/2014 10:13 PM
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2/3/2014 9:42 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/5/2021 Posts: 10212 Rating: (1699)	flcorbin So after checking all this, eitheir with Libnodav library or Snap7, that we can extract the PLC tags names. If any one have done something like I need (extracting the PCL Tags), please let me know. For now, we'll stick to exporting the PLC Tags manually from the TIA software and then apsing it for the PC client. Thanks. You could use something like wireshark to sniff the network packets when portal downloads the plc tags to see if that "file" or data package is configured in a way that a specific function call returns all the plc tags and DBs/structures within the currently downloaded programming. I know I can upload plc tags, db's/structures from a plc, so it must be possible to interrogate. I thought I remembered reading something about it in Snap7 that it could perform an upload from a running processor. You might be better off using Support Requestwith your exact needs to see if Siemens has a simple way to either purchase software, or a license to a library that saves you hours of reverse engineering or re-engineering after every plc change.
	science guy
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2/3/2014 10:14 PM	Rate (0)
flcorbin Regular Member Joined: 10/19/2010 Last visit: 12/16/2015 Posts: 13 Rating: (0)	Thanks. I think it will be what we will be aiming for now.

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