ISPSoft User Manual

Chapter 15 Password Management and Data Protection
If the subroutine is not protected by a subroutine password, there will be two boxes used to set a
subroutine password in the Subroutine Password Setting window. If the users want to set a
subroutine password, they have to type the same password in the two boxes, and click OK.
If the subroutine is protected by a subroutine password, there will be one box used to unlock the
subroutine password in the Subroutine Password Setting window. If the users want to unlock the
subroutine password, they can type the correct password in the box, and click OK.
The users can only type English letters, numerical digits, and spaces in the window. A POU
password is case-sensitive. After the users set a subroutine password, the subroutine will be
protected by the subroutine password. The window will be closed after the users click Cancel.
15.6 Other Password Protection functions and Data
Protection Functions
15.6.1 Inactivating the Uploading of the Program from a DVP
Series PLC
Users can inactivate the uploading of the program from a DVP series PLC. If this function is used,
the uploading of the program from the DVP series PLC will be prohibited. The uploading of the
program from the DVP series PLC will be allowed only after the PLC is restored to the default setting.
Besides, if a PLC password is set in the PLC, it has to be unlocked before this function is used. The
data in the PLC do not need to be protected by a PLC password after the uploading of the program
from the PLC is inactivated, and therefore the users can not set a PLC password.
If the users want to inactivate the uploading of the program from the DVP series PLC, they can click
the PLC menu, point to System Security, and click Program Upload Disable. After the uploading
of the program from the PLC is inactivated, the data in the PLC can not be uploaded. As a result, the
users have to decide whether they need to back the data in the PLC up in advance.
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