<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<TITLE>Apcupsd EEPROM Configuration</TITLE>
<meta name="Author" content="Kern Sibbald">
<link rel=stylesheet href="apcupsd-styles.css" type="text/css">
</HEAD>
<BODY>
<H2>Configuring Your EEPROM</H2>
If you have a SmartUPS, there are depending on the UPS at least 12
different values stored in the EEPROM that determine how
the UPS reacts to various conditions such as high line
voltage, low line voltage, power down grace periods, etc.
<p>
In general, for the moment, we do not recommend that you
change your EEPROM values unless absolutely necessary. There
have been several reported cases of problems setting the
Low Transfer Voltage. Consequently, if at all possible, do
not attempt to change this value.
<p>If despite these warnings, you must change your EEEPROM,
we recommend connecting your UPS to a Windows or NT machine
running PowerChute and making the changes.
<p>If you have no other choice, you may also change the EEPROM
values with <b>apcupsd</b>. Before doing so, please make
a printed copy of your UPS as it is before any EEPROM changes so
that you can check the changes that you have made.
Do so by printing a copy of the output from <b>apcaccess status</b>
and also print a copy of the output from <b>apcaccess eprom</b>.
<p>Once this is done, choose which values of the EEPROM you want
to change. Choose the new values from the list provided by
<b>apcaccess eprom</b>. For the battery date, and the UPS name,
you can use any eight characters.
<p>To make the EEPROM changes with <b>apcupsd</b> you must first
stop the <b>apcupsd</b> daemon. See <a href="stopping.html">Stopping <b>Apcupsd</b></a>
in the appropriate section of this manual.
Then edit the appropriate configuration directive in <b>/etc/apcupsd/apcupsd.conf</b>.
<p>
NOTE: we recommend that you change one EEPROM value at a time, by defining only
one configuration directive at a time. After each change, check that everything is
OK before proceeding to the next value you wish to change.
<p>
To actually change the EEPROM, as <b>root</b> with the <b>apcupsd</b> daemon stopped,
enter:
<p class="indent"><b>apcupsd -c</b>
<p>When it has completed the reprogramming of the EEPROM, it will print
the new STATUS report. Check that you got the expected results before continuing.
<p>The list of configuration directives and the permitted values for the
SmartUPS follows:
<p><pre>
Valid EEPROM values for the SMART-UPS 1000
Config Current Permitted
Description Directive Value Values
===================================================================
Upper transfer voltage HITRANSFER 253 253 264 271 280
Lower transfer voltage LOTRANSFER 204 196 188 208 204
Return threshold RETURNCHARGE 15 00 15 50 90
Output voltage on batts OUTPUTVOLTS 230 230 240 220 225
Sensitivity SENSITIVITY H H M L L
Low battery warning LOWBATT 2 02 05 07 10
Shutdown grace delay SLEEP 180 020 180 300 600
Alarm delay BEEPSTATE T 0 T L N
Wakeup delay WAKEUP 60 000 060 180 300
Self test interval SELFTEST 336 336 168 ON OFF
</pre>
<p>
<b>apcaccess eeprom</b> will produce the list that is appropriate for
your UPS.
<hr>
<a href="data.html" target="_self"><img src="back.gif" border=0 alt="Back"></a>
<a href="events.html" target="_self"><img src="next.gif" border=0 alt="Next"></a>
<a href="index.html"><img src="home.gif" border=0 alt="Home"></a>
</BODY>
</HTML>
