Chapter 19 Password Management and Data Protection 19.6.2 Setting Read-only Area The values stored in the read-only devices in a PLC can not be altered at will. After users set read-only device ranges in a DVP series PLC, they can not alter the values in the devices in these ranges through communication. If the users want to alter the values in the devices in these ranges, they have to restore the PLC to the default setting. If the users want to set read-only device ranges in the DVP series PLC, they can click the PLC menu, point to System Security , click Read Only Area Setting . In the Read Only Area Setting window, the users have to the Read Only Area Setting window.
select device types, and set read-only device ranges. After the setting is complete, the users can click Set in *. Before the function is used, users have to check whether the model selected and the firmware version of the model supports this function. Please refer to operation manuals or technical documents for more information. 19.6.3 Setting TC-01 Password Key Users can set a TC-01 password key in DVPDU-01, a digital setup display. A drawing of DVPDU-01 is shown below. DVPDU-01 provides a simple operation interface for a DVP series PLC. 19-13