2. An Overview of the Display Manager

DM uses the display list (.dl) files configured by EDD to establish connections to channels through Channel Access and to display the values of those channels along with the static elements of the display. It then updates the channel values as necessary. Via monitor objects, the operator can keep track of the values of channels, and via control objects, the operator can send values to channels. Dynamic objects can also be configured to turn a certain color when a certain condition exists, thus alerting the operator to that condition. In addition, there are objects with which the operator can start programs or open other displays. With all these capabilities, an operator can see the status of process variables and change their states and values as needed.

DM utilizes standard I/O devices: keyboard, mouse, and monitor. The operator's interaction with these I/O devices was designed to be as consistent as possible with that of EDD and other EPICS tools, such as the archive editor. Like EDD, DM runs on a UNIX platform, within the X-windows environment, and on a SPARC, DEC, or HP workstation. In order to compile DM, the X11R5 and Motif1.2 libraries are needed.

For more information on DM and its run-time behavior, see Chapter 9, DM: Run-time Operation. Though short, the chapter will provide all you need to know in order to use DM at run-time.

EDD/DM User's Manual, 2.4 - 27 MARCH 1997

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2. An Overview of the Display Manager

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