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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 circuit power supply or control power
supply during operation before you turn OFF the servo, the Ser-
vomotor will stop as follows:
• If you turn OFF the main circuit power supply during operation with-
out 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.
• If you use a SERVOPACK with the Dynamic Brake Hardware Option,
the Servomotor stopping methods will be different from the stopping
methods used without the Option or with other Hardware Options.
For details, refer to the following manual.
Σ-7-Series Σ-7S/Σ-7W SERVOPACK with Dynamic Brake Hardware
Option Specifications Product Manual
(Manual No.: SIEP S800001 73)
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 dam-
age, burning, or injury.
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