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\bc {\bf 4.24\_V2.2 Warm Boot the Active ACIS BEP and Start DEA HK Run } 
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\normalsize
\noindent{\it Last Revised: \today}\\
\noindent{\bf Filename: warmboot\_hkp} \\


\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\
\normalsize
This contains two ``atomic'' procedures which warm boot the active
ACIS BEP and restart the DEA housekeeping telemetry.
ACIS flight software can be booted in either cold or warm mode.  
The warm boot reloads the flight code, applies patches and bad 
pixel/column lists, and cleans up memory buffers. The second step
loads a DEA Housekeeping parameter block and starts a DEA Housekeeping run.
The ACIS Operations Team believes that in almost all situations it is
desirable to start a DEA Housekeeping run immediately after a warm
boot. Nevertheless, the operator should evaluate the current situation
and determine if this is the appropriate action.
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\noindent The sequence of actions will be: 
\be
\item set the boot-from-uplink flag to zero (should already be zero)
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\item set the warm boot flag on
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\item halt the active BEP
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\item restart the active BEP
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\item verify BEP booted from SW TLM verifiers
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\item check HW LEDs
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\item check SW LEDs
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\item load the DEA Housekeeping PB 
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\item start the DEA Housekeeping run
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\item inspect FP temp value and stability
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\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Upon successful completion of steps 1 through 7, steps 8 and 9 assume
that at least one side of the DPA and DEA A are on, and the flight SW is
running.\\

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\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize


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\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
This procedure does not change the active BEP, whichever BEP is
selected is warmbooted.\\

The parameters for the threshold crossings patch, txings, will
revert to defaults when this is run. They should be restored
to their desired values. \\

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\normalsize
\noindent {\bf REFERENCES:} \\
\normalsize
\noindent ACIS Long Form Functional Test Procedure (36-01301.01) \\
\noindent ACIS Short Form Functional Test Procedure (36-01301.02) \\
\noindent ACIS Science Instrument SW User's Guide (36-54003) \\

\normalsize
\noindent {\bf CHANGE HISTORY:} \\
\normalsize

{\bf V2.0}
\begin{itemize}
\item Combined the warmboot (4.17\_V2.0) with the load and start DEA
housekeeping (1.4\_V2.0).
\end{itemize}

{\bf V2.1}
\begin{itemize}
\item Fixed an incorrect mnemonic.
\end{itemize}

{\bf V2.2}
\begin{itemize}
\item Added reminder to reset txings parameters
\end{itemize}

\newcommand{\tablecaptiontext}{Warm Boot the Active ACIS BEP and Start DEA HK Run}
\input{warmboot_hkp.tab}
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