1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

52 Controller Memory and File TypesAllow Future AccessSetting (OEM Lock)The controller supports a feature which allows you to select if futureaccess to the User Program should be allowed or disallowed after it hasbeen transferred to the controller. This type of protection is particularlyuseful to an OEM (original equipment manufacturer) who develops anapplication and then distributes the application via a memory module orwithin a controller.The Allow Future Access setting is found in the Controller Propertieswindow as shown below.When Allow Future Access is deselected, the controller requires that theUser Program in the controller is the same as the one in the programmingdevice. If the programming device does not have a matching copy of theUser Program, access to the User Program in the controller is denied. Toaccess the User Program, clear controller memory and reload theprogram.TIPFunctions such as change mode, clear memory, restore program, andtransfer memory module are allowed regardless of this selection.Controller passwords are not associated with the Allow Future Accesssetting.Web View DisableThis allows selective disabling individual Data Files from Web View.Publication 1766-RM001A-EN-P - October 2008