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2. System Start and System Stop Applications
2.
System Start and System Stop Applications
The GS FLX+ Instrument is designed for continuous operation and under normal circumstances, sequencing Run Operators do not need to perform any restart or shutdown procedures. In the event that the instrument does need to be restarted or shutdown, the System Start and System Stop applications, accessed by the systemStart and systemStop icons on the GS FLX+ Instrument desktop, may be used (Figure 2).
Figure 2: System Start and System Stop application icons
The systemStart and systemStop icons launch shell scripts which control the instrument application background processes. The systemStart application is used to reinitiate these processes and the systemStop application is used to halt them.
The systemStart application can be launched by double-clicking the desktop systemStart icon. This will initiate the background software processes in the proper sequence. A message box titled ‘Initializing 454 Software’ will report the progress of the initialization steps (Figure 3). When the systemStart application has finished successfully, the message box will close and all on-instrument applications will become available. The instrument’s indicator light will go from red to solid yellow when the initialization steps are complete, indicating that the instrument is waiting for the next operator action.
Figure 3: systemStart application progress message box
The systemStop application can be launched by double-clicking the desktop systemStop icon. A Shutdown Confirmation window will appear (Figure 4). Clicking OK will initiate an orderly shutdown of the background instrument application processes. The instrument’s indicator light will go from solid yellow to red, indicating that the instrument application background processes are no longer active.
Figure 4: Shutdown Confirmation window for the systemStop application
 
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Both systemStart and systemStop applications, when launched, will shut down any active application processes. Any running procedures, such as sequencing Runs, will abort and no further data will be acquired.
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The systemStart and systemStop applications (or a user logging out event) will not shutdown the GS Sequencer or GS Run Browser GUIs. The GUIs remain functional even if the backend processes have been stopped. As mentioned above, there is normally no reason to stop the backend processes.