APC UPS control system - Manual (Page 194)

Dip switch info
Bit Switch Option when bit=1
0 4 Low battery alarm changed from 2 to 5 mins. Autostartup
disabled on SU370ci and 400
1 3 Audible alarm delayed 30 seconds
2 2 Output transfer set to 115 VAC (from 120 VAC) or to 240
VAC (from 230 VAC)
3 1 UPS desensitized - input voltage range expanded
4-7 - Unused at this time
Status bits
This is probably the most important register of the UPS, which indicates
the overall UPS status. Some common things you’ll see:
• 08 = On line, battery OK
• 10 = On battery, battery OK
• 50 = On battery, battery low
• SM = Status bit is still not available (retry reading)
Bit Hex
Bit Meaning
0 0x01 1 = Runtime calibration occurring Not reported by Smart
UPS v/s and BackUPS Pro
1 0x02 1 = SmartTrim Not reported by 1st and 2nd generation Smar-
tUPS models
2 0x04 1 = SmartBoost
3 0x08 1 = On line (this is the normal condition)
4 0x10 1 = On battery
5 0x20 1 = Overloaded output
6 0x40 1 = Battery low
7 0x80 1 = Replace battery
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