E-Bar Button Description

One of the basic items to remember is that the buttons are order of angst or panic. Certainly the hardware soft-stop or E-stop should be used when personnel or equipment are in imediate danger.

Stop

The Stop button refers to stopping a scan not stopping the telescope motion. This button will be greyed out when no scans are being executed. The action performed by pressing the stop button is that the antenna control system will gently slow to tracking a point in the currently selected coordinate system.

Abort

The Abort button has a similar effect as the stop button, with the exception of causing the system to slow to an Az/El relative stop. The Az/El drives remain energized after stopping.

Disable Subreflector / Disable Prime Focus

These buttons cause the subreflector or prime focus axes to disable.

Disable Az/El

This button executes a software soft-stop. The system sends a request to the CCU to disable the Az/El axes.

Halt

The Halt button will cause the antenna to Hard-stop. For this reason it should not be used, unless personel or equipment is in danger. Use the yellow soft-stop or red hard-stop push-buttons instead.

Get Control

The Halt button turns into the Get Control button, when the NRAO system does not have control. Anytime control is transfered between systems a hard-stop is executed. Always be sure the antenna is not in motion when transfering control.