Changes

Below is a screenshot of the main "Controls" tab of the TCS, where everything required for routine observing is located. There is one other tab, for more rarely used "Advanced" functions. The Controls tab is split into four main panels: command of the telescope and instrument selection on the left; the status of each subsystem in the middle; time and positional information and the LCU on the upper right; and important buttons that need to be easily accessible on the bottom right.

[[File:LesediTCScontrolsTabAnnotated_20220216v3LesediTCScontrolsTabAnnotated_20220216v4.png|thumb|1000px|frame|left|The main Controls tab of the TCS indicates the status of all subsystems; displays the time, telescope and dome position; gives access to a target catalogue; and allows the user to slew and offset the telescope, adjust the focus focus and select the required instrument.]]

Clicking on the three vertical dots beside a subsystem displays a drop down list of further subsystem status info, as can be seen below "Dome" and "Rotator 1" in the central panel of the screenshot above. The meaning behind the colour coding of subsystem status is as follows:

*'''Green''': a subsystem or state is either selected (e.g. in the screenshot above, the telescope is tracking at the sidereal rate, and the SHOC Mookodi instrument is selected), or is in the correct state for observing (e.g. mirror covers open, dome shutters open, telescope tracking, dome tracking, rotator 1 (SHOC) tracking).*'''Orange''': a subsystem is in an inappropriate state for observing. If the mirror covers or dome shutters are closed, their indicators would turn orange; likewise if the lights are switched on , their indicators would be orange. In the screenshot above, Rotator 2's indicator is orange - this is acceptable because SHOC (selected in green on the left) is mounted on Rotator 1, so only Rotator 1 needs to track with the telescope. *'''Blue''': a parameter that can be which has a range of permissible numerical values is indicated in blue, e.g. azimuth or , RA, airmass, etc.

It is important to note the '''Emergency Stop''' button on the lower right of the TCS display. It is always visible on both tabs, and will stop the motion of the dome, shutters, telescope, rotators and secondary mirror. It will not stop the autoguider XY-slides, the mirror covers or the tertiary mirror. The Emergency Stop button should be clicked if anything that is moving is going to cause a hazard. Once clicked, the Emergency Stop button will be toggled to read '''Reset''', and you must ensure that it is safe to reset all the subsystems before pressing this button to continue. Call a technician if necessary.

You can watch the startup procedure from the webcam by turning on the slew lights in the Advanced tab. While the procedure is running, the Startup button displays a revolving circle, and the indicators on the status panel on of the Controls tab is are updated with the appropriate colour as each subsystem is activated. Don't try to perform any other operation until the procedure is complete, when the text on the Startup button will be replaced with "Shutdown". The Mookodi rotator is automatically selected on startup to ensure that observations are not made with the tertiary mirror in an unknown position, so to use Sibonise you will need to select the instrument after the startup procedure has completed.