read data and the value of variables

IBN-Service

 

mostafa1991

Stuxnet

for example stuxnet virus change plc but logger cant detect itwe want to extract data from PLC because wincc cant detect it

 

 

You told us you are an IT-Man and you are attacked by Stuxnet?

You are kidding?

 come on...i am not attacked by Stuxnet,it was just a example. i am from iran and I am IT-MAN and my  job is to setup a secure network so i have to monitor all logs from switches routers servers and..

now we have a project that they have PLC and they want to monitor the data of PLC.

we can get log of plc by wincc but when plc's attacked by hackers and hacker change data variables by malisious code(like virus or Stuxnet)wincc can not detect it

ok?

now i want to write program to get data of PLC

Mostafa,

thnx for reply, but if this is your task (collect data, create datalog, send it to server), question is how many data you need log (pay attention to media capacity, I know that you say - ALL DATA), how long you need log that data, how server can run right comparing that 2 logs or DB with data,... You can say that other side isn't your task, but still I think that without proper synchro (idea, cooperation) cant imagine that, and probably as you said what about inconzistency of data? Alarm??? Where can be problem in that case of problem? Will be all data transformed from WinCC to PLC for proper functionality of PLC? Sry, only giving some ideas about my vision of this.

Update: I was reading about that stuxnet, it can change frequency of some devices f.ex. but how do you know that change of that freq is ok (it change due requirements of PLC logic) and isn't attacked from some code in DB890?

Kahl

Hi!

You can use an OPC server to gather data from those PLCs (S7-200; S7-300; S7-1x00).

 excuse me,one question.if i setup OPC server after that can i get data by our software??

Duris_I

Mostafa,

thnx for reply, but if this is your task (collect data, create datalog, send it to server), question is how many data you need log (pay attention to media capacity, I know that you say - ALL DATA), how long you need log that data, how server can run right comparing that 2 logs or DB with data,... You can say that other side isn't your task, but still I think that without proper synchro (idea, cooperation) cant imagine that, and probably as you said what about inconzistency of data? Alarm??? Where can be problem in that case of problem? Will be all data transformed from WinCC to PLC for proper functionality of PLC? Sry, only giving some ideas about my vision of this.

Update: I was reading about that stuxnet, it can change frequency of some devices f.ex. but how do you know that change of that freq is ok (it change due requirements of PLC logic) and isn't attacked from some code in DB890?

 u know i don't have vision of PLC,i am network engineer,

just my boss told me that i should collect data from plc.not by wincc,by code and compile it in plc.

he told me that is very simple and u should worked with variables

just i know it

can u read this page:

https://support.industry.siemens.com/cs/document/24299099/how-do-you-create-an-opc-client-with-microsoft-excel?dti=0&lc=en-WW

i think we need something like this,but without using excel

and please check attachment,i think i have to collect these data like a picture

Hi!

You can buy an OPC client or you can write your own one.

https://info.kepware.com/visual-basic-source-code

http://www.matrikonopc.com/resources/opc-tutorials.aspx