Configuring Your EEPROM
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.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.
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.
If you have no other choice, you may also change the EEPROM values with apcupsd. 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 apcaccess status and also print a copy of the output from apcaccess eprom.
Once this is done, choose which values of the EEPROM you want to change. Choose the new values from the list provided by apcaccess eprom. For the battery date, and the UPS name, you can use any eight characters.
To make the EEPROM changes with apcupsd you must first stop the apcupsd daemon. See Stopping Apcupsd in the appropriate section of this manual. Then edit the appropriate configuration directive in /etc/apcupsd/apcupsd.conf.
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.
To actually change the EEPROM, as root with the apcupsd daemon stopped, enter:
apcupsd -c
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.
The list of configuration directives and the permitted values for the SmartUPS follows:
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
apcaccess eeprom will produce the list that is appropriate for your UPS.