YASKAWA SGD7S-1R9D Product Manual page 16

 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 motor will coast to a stop or stop with the dynamic brake according
to a setting in the SERVOPACK. The coasting distance will change with the moment of inertia of
the load. Check the coasting distance during trial operation and implement suitable safety mea-
sures 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.
 Design the system to ensure safety even when problems, such as broken signal lines, occur.
For example, the P-OT and N-OT signals are set in the default settings to operate on the safe
side if a signal line breaks. Do not change the polarity of this type of signal.
 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 or it will coast to a stop.
• If you turn OFF the control power supply during operation without turning OFF the servo, the Servo-
motor will stop abruptly with the dynamic brake or it will coast to a stop. For details, refer to the man-
ual for the SERVOPACK.
• If you use an External Dynamic Brake Resistor, the Servomotor stopping method will be different
from when the built-in dynamic brake resistor is used. For details, refer to the product manual for
your SERVOPACK.
 Do not use the dynamic brake for any application other than an emergency stop.
There is a risk of failure due to rapid deterioration of elements in the SERVOPACK and the risk of
unexpected operation, machine damage, burning, or injury.
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WARNING
CAUTION