FANUC Series 16/18/160/180-Model C Connection Manual (Hardware)

B–62753EN/01
5. POWER SUPPLY UNIT CONNECTION
65
Turn on the power to each unit in the following order or all at the same
time.
1 Power supplies (200 VAC) for the entire machine
2 Power supplies (24 VDC) for slave I/O devices connected
using the FANUC I/O Link (such as the I/O Unit–MODEL A)
3 Power supplies (24 VDC) for the control unit and CRT unit
(200 VAC for the PDP unit)
Do not disconnect the battery for memory backup (3 VDC) or the battery
for the separate absolute pulse coders (6 VDC) regardless of whether the
power to the control unit is on or off. If batteries are disconnected when
the power to the control unit is turned off, current data stored in the control
unit for the pulse coders, parameters, programs etc, are lost.
Make sure that the power to the control unit is on when replacing batteries.
See Section 3.8.2 for how to replace the batteries for memory backup.
Turn off the power to each unit in the following order or all at the same
time.
1 Power supplies (24VDC) for slave I/O devices connected
using the FANUC I/O Link (such as the I/O Unit–MODEL A)
2 Power supplies (24 VDC) for the control unit and CRT unit
(200 VAC for the PDP unit)
3 Power supplies (200 VAC) for the entire machine
Motors cannot be controlled when the power is turned off or momentarily
interrupted. Take appropriate action on the machine side when necessary.
For example, when the tool is moved along a vertical axis, apply brakes
to prevent the axis from falling. Apply a brake that clamps the motor when
the servo is not operating or the motor is not rotating. Release the clamp
only when the motor is rotating. When the servo axis cannot be controlled
when the power is turned off or momentarily interrupted, clamp the servo
motor. In this case, the axis may fall before the relay for clamping starts
operating. The designer should make sure if the distance results in trouble.
5.3.2
Procedure for Turning
on the power
5.3.3
Procedure for Turning
off the Power

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