Denso RC5 - Manual (Page 55)

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3.2.9 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 lower than acceptable.
(2) Terminal number
No.8 of connector CN10.
(3) Usage
The signal is used to check the timing battery replacement. For example,
the battery voltage becomes lower than acceptable.
(4) ON condition
The signal will be turned ON when the voltage of the encoder back-up
battery or memory back-up battery becomes lower than acceptable.
Caution: The operating panel shows any of ERROR64A1 to 64A6 when
the encoder back-up battery voltage is low. Meanwhile, the
teach pendant shows ERROR6103 when the memory back-up
battery voltage is low.
(5) OFF condition
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
⋅
Battery replaced
Dead battery
warning output
Power ON Power ON Power ON Power OFF Power OFF
⋅
The voltage of the
encoder backup
battery or memory
back-up battery
becomes dangerously
low.