5/23/2014 6:54 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hello Abdel-Qader Password can be Set for : a) Access to CPU Program - To prevent Unauthorised access to CPU Program b) WinCC user Access for various activities - e.g. Tag Value Change or Exit WinCC c) GPRS Communication There is no password facility for communication between a HMI and a PLC CPU. Probably no need was ever felt for this .... You can however create some kind of authorisation usinga C/VB Script. In the simplest case, the HMI can periodically write a Authorisation code to a DB in PLC. PLC only updates data in HMI DBs if this code is O.K. Of course the possibilities are endless for a skilled programmer. However I am curious to know why do you want this ? If you want to protect your know how, you can protect your HMI and PLC programs seperately. Hope this helps Cheers Navnag |
There is no such thing as the last bug in a program |
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5/24/2014 1:06 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Dear Abdel-Qader I think this is what you are looking for :
With a complete protection, the CPU forbids: - read and write access to the hardware configuration and the blocks, - HMI access, - modifications in the server function for PUT/GET communication, - read and write access in the area “Accessible devices” and in the project for devices that are switched online Attachment77431846_Security_SIMATIC_DOKU_V10_en.pdf (146 Downloads) |
There is no such thing as the last bug in a program |
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This contribution was helpful to1 thankful Users |
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