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2553/ 2553E Command Guide
Controlling the Front Panel
In some applications it may be advantageous to use the 2553/ 2553E display panel to
relate information to the operator. In these situations it is often desirable to ensure that
the user is viewing the desired display data, rather than relying on the user selecting
which data to display.
The various formats of the DISPLAY command, detailed on page 31, allow the controller
to enforce the display of the desired information. When using this facility, the 2553/
2553E should be placed into the REMOTE state (preferably the REMOTE WITH
LOCAL LOCKOUT state) to ensure that the operator cannot override the controller.
Under some circumstances it may be desired to duplicate the front panel of the 2553/
2553E on the display panel of the controller. All data presented on the front panel is also
available as measurement results and configuration interrogative commands via the
IEEE488 interface, thus this may be achieved by the user in the normal manner.
Although not documented in this guide, there are alternative methods for achieving this
by accessing the actual pixel data for the graphics display on the 2553/ 2553E front panel
and using the KEY command documented in this guide. The method of performing this
using National Instruments LabView™ is available on request, the user should contact
Vitrek
for assistance in this regard if required.
Debugging the Application
When debugging IEEE488 control applications the following points should be
considered.
•
Initially send all commands as single commands, i.e., do not send multiple
commands with a single terminator. In this manner, by single stepping through the
commands, the user can establish which command is causing a syntax error should
this occur. Since there is little benefit, in the 2553/ 2553E, to sending multiple
commands, the user should consider not using them.
•
The user should consider testing all measurement result definitions, and checking
their responses, by using an interactive manual utility such as the IBIC program
provided with the National Instrument controllers. In this manner the user is not
debugging both the software and the 2553/ 2553E interface at the same time.
•
By viewing the
Setup
display while controlling the 2553/ 2553E, the user may check
that the correct IEEE488 activities are taking place. To the immediate right of the
IEEE address selection in this display may be the words TALK, LISTEN and SRQ.
These are displayed when each of these bus activities takes place. Under some
circumstances the user may need to slow down the response of the IEEE488 bus to
ensure that changes in these are visible.
Summary of Contents for Xitron 2553
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Page 10: ...10 2553 2553E Command Guide ...
Page 38: ...38 2553 2553E Command Guide ...
