APC UPS control system manual Programming the UPS Eeprom

DFO == (4)-all-countries (D)omestic (I)nternational (A)sia (J)apan

(M) North America - servers.

RSP == Total number possible answers returned by a given CMD. FSZ == Max. number of field positions to be filled.

FVL == Values that are returned and legal.

Programming the UPS EEPROM

There are at this time a maximum of 12 different values that can be pro- grammed into the UPS EEPROM. They are:

Item	Command	Meaning
1.	c	The UPS Id or name
2.	x	The last date the batteries were replaced
3.	u	The Upper Transfer Voltage
4.	l	The Lower Transfer Voltage
5.	e	The Return Battery Charge Percentage
6.	o	The Output Voltage when on Batteries
7.	s	The Sensitivity to Line Quality
8.	p	The Shutdown Grace Delay
9.	q	The Low Battery Warning Delay
10.	k	The Alarm Delay
11.	r	The Wakeup Delay
12.	E	The Automatic Self Test Interval

The first two cases (Ident and Batt date) are somewhat special in that you tell the UPS you want to change the value, then you supply 8 characters that are saved in the EEPROM. The last ten item are programmed by telling the UPS that you want it to cycle to the next permitted value.

In each case, you indicate to the UPS that you want to change the EEPROM by first sending the appropriate query command (e.g. “c” for the UPS ID or “u” for the Upper Transfer voltage. This command is then immediately followed by the cycle EEPROM command or “-”. In the case of the UPS Id or the battery date, you follow the cycle command by the eight characters that you want to put in the EEPROM. In the case of the other ten items, there is nothing more to enter.

The UPS will respond by “OK” and approximately 5 seconds later by a vertical bar (—) to indicate that the EEPROM was changed.

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