Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 203)

5.11 Safety Function
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Ope
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(3) Procedure
5.11.4 Confirming Safety Functions
When starting the equipment or replacing the SERVOPACK for maintenance, be sure to conduct the following
confirmation test on the HWBB function after wiring.
• Confirm that the SERVOPACK enters a hard wire base block state and that the servomotor does not operate
when the /HWBB1 and /HWBB2 signals are OFF.
• Check the ON/OFF states of the /HWBB1 and /HWBB2 signals with Un015.
→ If the ON/OFF states of the signals do not coincide with the display, an error in the external device, dis-
connection or short-circuiting of the external wiring, or a failure in the SERVOPACK must be considered.
Find the cause and correct the problem. For details, refer to 8.7 Monitor Display at Power ON.
• Check with the display of the feedback circuit input of the connected device to confirm that the EDM1 sig-
nal is OFF while in normal operation.
5.11.5 Precautions for Safety Functions
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2
3
4
6
Request to open the guard.
Open the guard and enter.
The /HWBB1 and /HWBB2 signals are
OFF and HWBB function operates.
(The operation in the guard is available.)
5
After completing the operation, leave and
close the guard.
When the servomotor is operating, the host
controller stops the servomotor and turns
OFF the Servo ON signal (/S-ON).
Turn ON the /S-ON signal from the host con-
troller.
WARNING
• To check that the HWBB function satisfies the safety requirements of the system, be sure to conduct a risk
assessment of the system.
Incorrect use of the machine may cause injury.
• The servomotor rotates if there is external force (e.g., gravity in a vertical axis) when the HWBB function is
operating. Therefore, use an appropriate device independently, such as a mechanical brake, that satisfies
safety requirements.
Incorrect use of the machine may cause injury.
• While the HWBB function is operating, the motor may rotate within an electric angle of 180 ° or less as a
result of a SERVOPACK failure. Use the HWBB function for applications only after checking that the rota-
tion of the motor will not result in a dangerous condition.
Incorrect use of the machine may cause injury.
• The dynamic brake and the brake signal are not safety-related parts of a control system. Be sure to design
the system that these failures will not cause a dangerous condition when the HWBB function operates.
Incorrect use of the machine may cause injury.
• Connect devices meeting safety standards for the signals for safety functions.
Incorrect use of the machine may cause injury.
• If the HWBB function is used for an emergency stop, turn OFF the power supply to the servomotor with
independent electric or mechanical parts.
Incorrect use of the machine may cause injury.
• The HWBB function does not shut off the power to the SERVOPACK or electrically isolate it. Take mea-
sures to shut off the power to the SERVOPACK when performing maintenance on it.
Failure to observe this warning may cause an electric shock.