Denso RC5 - Manual (Page 102)

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4.2.13 Dead Battery Warning (Output)
(1) Function
The signal will be output when the voltage of the encoder back-up battery
or memory back-up battery becomes dangerously low.
(2) Terminal number
No. 14 of connector CN10.
(3) Usage
The signal is used to check the timing of battery replacement (lowering of
the battery voltage).
(4) ON conditions
The signal will be turned ON when the voltage of the encoder back-up
battery or memory backup battery becomes dangerously low.
Caution: Any error of ERROR64A1 to 64A6 indicating the dead encoder
back-up battery or ERROR6103 informing the dead memory
back-up battery will be displayed on the operating panel and
the teach pendant.
(5) OFF conditions
The signal will be turned OFF when the power is turned ON after the dead
battery was replaced.
Dead Battery Warning Output
Robot power ON state
Power ON Power ON Power OFF Power OFF Power ON
⋅
The voltage of the encoder backup
battery or memory back-up battery
becomes dangerously low.
Dead battery
warning output
⋅
Battery replaced