HP vp6300 HP vp6300 Series Digital Projector - User's Guide - Page 53

The following table shows the specific syntax to use for various requested tasks. To perform this task... Change a setting to a specified value Ask the current setting Increment a setting Decrement a setting Invoke an action (no parameter needed) Use this request syntax... *command=value *command=? *command=+ *command=- *command In general, every request sent to the projector generates one or more notification messages, which are sent to the room controller. Actions initiated by the projector can also generate notifications. The projector always sends notifications whenever a setting changes, whether as the result of a request from a controller, or as the result of an action, such as a button press or menu change. Some requested setting changes take time to perform, or are carried out in stages. Because of this, requests might produce delayed notifications. The following table lists the types of notifications generated in various situations. This type of request... Modify a setting Query a setting Execute an action Generates this type of notification... Echoes the request command and shows the resulting value: Request: *BRT=65 Notification: *BRT=65 Echoes the request command and shows the resulting value: Request: *CON=? Notification: *CON=40 Echoes the request command: Request: *NXT Notification: *NXT Incorrect commands cause the following types of notifications: • No asterisk at start of command-no response • Unrecognized command name-command with "?" added Connecting to a room controller 53