Yamaha RCX40 User Manual page 7

Reference
Refer to "4. Connecting the power" in
Chapter 3, "Installation".
Reference
Absolute reset is always required when
the robot controller power is first
turned on after connecting the robot
cable to the robot controller. Perform
absolute reset while referring to "11.8
Absolute reset" in Chapter 4,
"Operation".
Absolute reset is also required after the
robot cable was disconnected from the
robot controller and then reconnected.
Before using the robot controller
(Be sure to read the following notes.)
Please be sure to perform the following tasks before using the robot controller.
Failing to perform these tasks will require absolute reset for origin position setting each
time the power is turned on or may cause abnormal operation (vibration, noise).
[1] When connecting the power supply to the robot controller
Always make a secure connection to the ground terminal on the robot controller to
ensure safety and prevent malfunctions due to noise.
[2] When connecting the battery cable to the robot controller
The absolute battery is fully charged when the robot controller is shipped to the
customer. However, it is left disconnected to prevent battery discharge. After installing
the controller, always be sure to connect the absolute battery while referring to "9.
Connecting the absolute battery" in Chapter 3 before connecting the robot cables.
An error (relating to absolute settings) is always issued if the robot controller power is
turned on without making the absolute battery connections, so the origin position is
not detected. This means the robot connected to this controller cannot be used as
absolute specifications.
[3] When connecting robot cables to the robot controller
Be sure to keep robot cables separate from the robot controller power connection
lines and other equipment power lines. Using in close contact with lines carrying
power may cause malfunctions or abnormal operation.
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