75 lines
5.9 KiB
HTML
75 lines
5.9 KiB
HTML
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<meta name="abstract" content="Before you use a power-handling program to control system shutdown, you may want to familiarize yourself with related concepts." />
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<title>Controlled shutdown concepts</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Controlled shutdown concepts</h1>
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<div><p>Before you use a power-handling program to control
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system shutdown, you may want to familiarize yourself with related concepts.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzahrbbuco.htm">Battery backup unit</a></strong><br />
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A <dfn class="term">Battery Backup Unit (BBU)</dfn> provides a safety net
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for users who do not have an uninterruptible power supply or those with a
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failed uninterruptible power supply. </li>
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<li class="ulchildlink"><strong><a href="rzahrnopgmco.htm">Handling uninterruptible power supply conditions when no power-handling program exists</a></strong><br />
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Use this topic to learn about considerations when you are not a power-handling program to handle controlled system shutdown.</li>
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<li class="ulchildlink"><strong><a href="rzahrcnsdsco.htm">IPL considerations for uninterruptible power supply</a></strong><br />
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When the system performs an IPL, the Licensed Internal Code verifies various internal switches to see if the system was correctly powered down.</li>
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<li class="ulchildlink"><strong><a href="rzahrctldwnco.htm">Power loss controlled shutdown</a></strong><br />
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The power loss-controlled shutdown mechanism allows the system to shut down in an orderly fashion following a loss of utility power. The power loss-controlled shutdown mechanism is available only if you connected the system to an uninterruptible power supply.</li>
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<li class="ulchildlink"><strong><a href="rzahrpwrrstco.htm">Power restore IPL system value (QPWRRSTIPL)</a></strong><br />
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This value controls what happens if the system ends when utility power is interrupted and then restored at a later time.</li>
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<li class="ulchildlink"><strong><a href="rzahrupsco.htm">Uninterruptible power supply</a></strong><br />
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An uninterruptible power supply provides a source of ac power if utility power should fail. Typically, uninterruptible power supplies have a finite backup time.</li>
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<li class="ulchildlink"><strong><a href="rzahrdlytimco.htm">Uninterruptible power supply delay time system value (QUPSDLYTIM)</a></strong><br />
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QUPSDLYTIM is the system value for the Uninterruptible power supply delay timer.</li>
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<li class="ulchildlink"><strong><a href="rzahrmsgqco.htm">Uninterruptible Power Supply Message queue system value (QUPSMSGQ)</a></strong><br />
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The Uninterruptible Power Supply Message Queue (QUPSMSGQ) system value determines which message queues the power supply messages are sent to.</li>
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<li class="ulchildlink"><strong><a href="rzahrupsmsgrf.htm">Uninterruptible power supply messages</a></strong><br />
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Use this topic to learn about error messages related to uninterruptible power supply.</li>
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<li class="ulchildlink"><strong><a href="rzahrwkbatco.htm">Weak battery condition signal from uninterruptible power supply</a></strong><br />
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When the battery on the system falls below a specific level of charge, the uninterruptible power supply will issue a weak battery condition signal.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahrovrvwco.htm" title="A power-handling power program, when used with power protection devices, can minimize interruption during a power loss situation.">Control server shutdown using a power-handling program</a></div>
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