C1554M-A (4/05) 47

LOCKING A CAMERA

You can prevent other users or scripts from controlling a Pelco PTZ camera by locking the camera. When a camera is locked, only the user or script
that placed the lock can control the camera. If you attempt to control a locked camera, VMX300(-E) will display a message specifying that the
camera is locked and who placed the lock. To lock and control a particular camera, you must belong to, and log in under, a user group that allows
you to lock and control that camera.
Locking a camera prevents another user or script from:
•Panning, tilting, zooming, focusing, and adjusting the camera’s iris
•Managing presets and sending the camera to presets
•Managing and running patterns
Locking has no effect on auxiliaries. Scripts and other users can still control auxiliaries when the camera is locked, regardless of their priority.
Priority: Every VMX300(-E) user and script has a priority assigned by the system administrator. VMX300(-E) uses these priorities to resolve
situations in which two or more users or scripts attempt to control a particular device at the same time. The user with the higher priority is given
control of the device.
Taking the Lock: Depending on your priority, you might be able to take the lock from another user or a script that has locked a camera, giving you
control of the camera. You can take the lock from any user with lower priority than you. You can take the lock from any script with equal or lower
priority.
Automatic Unlock: VMX300(-E) automatically unlocks a camera you have locked under the following circumstances:
•If you log off, either by closing the client or by logging in a new user.
•If a workspace is opened.
•If you locked the camera from the Control tab of the Device Control dialog box and you close the dialog box.
•If you locked the camera from the gadget in a custom window and you change the content type for that window.
•If you locked the camera from the gadget in a custom window and the video input to the window is changed, either by you or by a script.
•If you locked the camera from the gadget in a custom window and you clear Visible for that window in the Workspace Properties dialog
box.
TIP: To prevent VMX300(-E) from automatically unlocking a camera you have locked, use the Lock button on the Device Control dialog box,
rather than the Lock button in the gadget.