APC UPS control system manual Register

Register 1

All bits are valid on the Matrix UPS. SmartUPS models only support bits 6 and 7. Other models do not respond.

Bit Hex	Meaning
Bit

00x01 In wakeup mode (typically lasts < 2s)

10x02 In bypass mode due to internal fault - see register 2 or 3

20x04 Going to bypass mode due to command

30x08 In bypass mode due to command

40x10 Returning from bypass mode

50x20 In bypass mode due to manual bypass control

60x40 Ready to power load on user command

70x80 Ready to power load on user command or return of line power

Register 2

Matrix UPS models report bits 0-5. SmartUPS models only support bits 4 and 6. SmartUPS v/s and BackUPS Pro report bits 4, 6, 7. Unused bits are set to 0. Other models do not respond.

Bit Meaning

0Fan failure in electronics, UPS in bypass

1 Fan failure in isolation unit

2 Bypass supply failure

3 Output voltage select failure, UPS in bypass

4 DC imbalance, UPS in bypass

5 Command sent to stop bypass with no battery connected - UPS still in bypass

6 Relay fault in SmartTrim or SmartBoost

7 Bad output voltage

Register 3

All bits are valid on the Matrix UPS and 3rd generation SmartUPS models. SmartUPS v/s and BackUPS Pro models report bits 0-5. All others report 0-4. State change of bits 1,2,5,6,7 are reported asynchronously with ? and

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