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RFID with simatic RF120C

Created by: pierre12risecasa at: 5/26/2019 2:53 PM (9 Replies)

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5/26/2019 2:53 PM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	Hello everybody, i have a school project in BTS with RFID. I work on TIA portal V15. I use a CPU S7-1200 with 2 RF120C and 2 RF240R. I do a Grafcet (sorry i'm french) and in the first step, i need to read a data from the RF240R. I use a Simatic ident Bloc. But when the block read and make the data in the "ident_data" i don't Know how to transform it in data that i can use in my program. Because after reading, we have 2 solutions: poudre or not and this is the receptivity of the grafcet. I don't knowhow to find this receptivity when the block read; It's dificult to explain my problem but i need your help please. i put the grafcet (in french) in this message and the program that i begin Attachment grafcetdosagebon.png (620 Downloads)
pierre12risecasa Posts: 8 Rating: (0)
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5/26/2019 2:54 PM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	sorry, the program : Attachment programme1.pdf (810 Downloads)
pierre12risecasa Posts: 8 Rating: (0)
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5/27/2019 6:51 PM	Rate (1)
Owei Gold Expert Joined: 10/1/2013 Last visit: 12/23/2025 Posts: 605 Rating: (71)	Hi, I think I need some more information to understand what you're up to :) Does the reading of the RFID data work? What do you want to do with that data?

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5/27/2019 9:40 PM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	HI, I does'nt test the link between the RF120C and the RF240R but i think it works. In the transponder m'y collegue Write some carachter in ASCII and i want tout use this data in m'y program. In fact i need to traduce the data because un my Grafcet if it's poudre they do some Things and if it's other thing thé grafcet go other part. So i want to take the data who are in the Ident_data block and traduce it to do a test in m'y programme. It's dificult to explain it. Do you anderstand me? And my problem? Thanks
pierre12risecasa Posts: 8 Rating: (0)
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5/28/2019 10:55 AM	Rate (1)
Owei Gold Expert Joined: 10/1/2013 Last visit: 12/23/2025 Posts: 605 Rating: (71)	You'll receive that data as an array of Byte. So actually all you need to do is transform that array to a String I guess. There are build-in functions in TIA Portal to transform the data.

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5/29/2019 10:36 AM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	Hi Thank you for your answer. But i don't find this function in TIA Portal. Can you schow me where are this function? Because i can't compare directly the Ident_data.
pierre12risecasa Posts: 8 Rating: (0)
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6/6/2019 12:46 PM	Rate (1)
Owei Gold Expert Joined: 10/1/2013 Last visit: 12/23/2025 Posts: 605 Rating: (71)	In the instruction library search for a function called "HTA".

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6/6/2019 3:26 PM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	Hello, thank you. It works but now i have an other problem. When i write data in the tag, i read it but when i want to write an other data, i have the same data at first in tampon read_data. it's a problem of the reset of the data i thing because when i restart the CPU, i can read the other data. I don't know why the data does'nt reset. Can you help me?
pierre12risecasa Posts: 8 Rating: (0)
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6/6/2019 7:11 PM	Rate (1)
Owei Gold Expert Joined: 10/1/2013 Last visit: 12/23/2025 Posts: 605 Rating: (71)	Just make sure you change the data in your buffer before you execute the write. Actually I would use two different buffers for read and write.

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6/6/2019 7:56 PM	Rate (0)
pierre12risecasa Posts: 8 Rating: (0)	Ok thanks, I will try and will to see if it works
pierre12risecasa Posts: 8 Rating: (0)
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