
4.POWER SUPPLY CONNECTION B-63943EN/02
- 66 -
4.4.3 Battery for Separate Absolute Pulse Coders (6VDC)
(1) When the voltage of the battery for absolute pulse coders
becomes low, DS alarms 306 to 308 occur.
(2) When DS alarm 307 (alarm indicating the voltage of the battery
becomes low) occurs, replace the battery as soon as possible. In
general, the battery should be replaced within one or two weeks,
however, this depends on the number of pulse coders used.
(3) If the voltage of the battery becomes any lower, DS alarm 306
(battery zero alarm) occurs. In this case, the current positions
for the pulse coders can no longer be maintained.
In this state, DS alarm 300 (reference position return request
alarm) occurs. Return the tool to the reference position after
replacing the battery.
(4) The service life of the batteries is about two years if they are
used in a six-axis configuration with αi/αis/βis series servo
motors and one year if they are used in a six-axis configuration
with α/β series servo motors. FANUC recommends that you
replace the batteries periodically according to the battery service
life.
(5) To connect the battery, use the battery case or incorporate the
battery into the servo amplifier. Note that the attachment
method of the battery depends on the connection method and the
type of servo amplifier.