Chapter 19 Password Management and Data Protection If the PLC is not protected by a PLC ID, there will be two boxes used to set a PLC ID in the PLC ID Setting window. If the users want to set a PLC ID, they have to type the same password in the two boxes, and click OK . If the PLC is protected by a PLC ID, there will be one box used to unlock the PLC ID in the PLC ID Setting window. If the users want to unlock the PLC ID, they can type the correct ID in the box, and click OK . If the users want to set a PLC ID, they can only type English letters, numerical digits, and spaces in the window. A PLC ID is case-sensitive.
Besides, the limit on the number of characters which can be typed depends on the model selected. The users have to type a PLC ID according to the hint in the window. After the users set a PLC ID, the PLC will be protected by the PLC ID. The window will be closed after the users click Cancel . 19.3 Project Password and PLC Password The project password set in a project is used to protect the program in the project. If users want to open the POUs in a project protected by a project password, the system will require the users to type the correct password. Besides, the users can limit the total number of password guesses that can be made.
If the number of password guesses that is made is larger than the total number of password guesses that can be made, the project will be closed automatically. The PLC password set in a PLC is used to protect the data in the PLC. If users want to download or upload a project, the system will ask the users to type the correct password. Besides, the users can limit the total number of password guesses that can be made. If the number of password guesses that is made is larger than the total number of password guesses that can be made, the PLC will be locked, and the data can not be downloaded/uploaded. To unlock the PLC, the users have to restore the PLC to the default setting.
19.3.1 Setting and Unlocking a Project Password After users click the Tools menu, point to Program Settings , and click Project Password Setting , the Project Password Setting window will appear. The message at the bottom of the window indicates whether the project is protected by a project password. If the project opened is a project for a DVP series PLC, the Program Copy to PCC01 checkbox will appear in the Project Password Setting window. 19-5