YASKAWA E Series Product Manual page 17

 Operation Precautions
 Before starting operation with a machine connected, change the settings of the switches and
parameters to match the machine.
Unexpected machine operation, failure, or personal injury may occur if operation is started before
appropriate settings are made.
 Do not radically change the settings of the parameters.
There is a risk of unstable operation, machine damage, or injury.
 Install limit switches or stoppers at the ends of the moving parts of the machine to prevent
unexpected accidents.
There is a risk of machine damage or injury.
 For trial operation, securely mount the Servomotor and disconnect it from the machine.
There is a risk of injury.
 Forcing the motor to stop for overtravel is disabled when the Jog (Fn002), Origin Search
(Fn003), or Easy FFT (Fn206) utility function is executed. Take necessary precautions.
There is a risk of machine damage or injury.
 When an alarm occurs, the Servomotor will coast to a stop or stop with the dynamic brake
according to the SERVOPACK Option and settings. The coasting distance will change with the
moment of inertia of the load and the resistance of the External Dynamic Brake Resistor. Check
the coasting distance during trial operation and implement suitable safety measures on the
machine.
 Do not enter the machine's range of motion during operation.
There is a risk of injury.
 Do not touch the moving parts of the Servomotor or machine during operation.
There is a risk of injury.
 Do not use the holding brake built into a Servomotor to stop the Servomotor. The holding brake
is designed to hold the motor shaft. It is not designed as a stopping device to ensure machine
safety. Provide an appropriate stopping device on the machine to ensure safety.
There is a risk of brake failure due to wear, damage to the machine, or injury.
 Before you operate a Servomotor, supply power to the holding brake to release the holding
brake. Refer to the timing charts in your Servomotor manual for details.
 During trial operation, confirm that the holding brake works correctly.
 When overtravel occurs, the power supply to the motor is turned OFF and the brake is released.
If you use the Servomotor to drive a vertical load, set the Servomotor to enter a zero-clamped
state after the Servomotor stops. Also, install safety devices (such as an external brake or
counterweight) to prevent the moving parts of the machine from falling.
 Always turn OFF the servo before you turn OFF the power supply. If you turn OFF the main cir-
cuit power supply or control power supply during operation before you turn OFF the servo, the
Servomotor will stop as follows:
• If you turn OFF the main circuit power supply during operation without turning OFF the servo, the
Servomotor will stop abruptly with the dynamic brake.
• If you turn OFF the control power supply without turning OFF the servo, the stopping method that is
used by the Servomotor depends on the model of the SERVOPACK. For details, refer to the manual
for the SERVOPACK.
WARNING
CAUTION
xvii