YASKAWA Σ-V Series User Manual page 132

(6) Operation with Utility Functions
The HWBB function works while the SERVOPACK operates in utility function mode.
If any of the following utility functions is being used with the /HWBB1 and /HWBB2 signals turned OFF, the
SERVOPACK cannot be operated by turning ON the /HWBB1 and /HWBB2 signals. Cancel the utility func-
tion first, and then set the SERVOPACK to the utility function mode again and restart operation.
• JOG operation (Fn002)
• Origin search (Fn003)
• Program JOG operation (Fn004)
• Advanced autotuning (Fn201)
• EasyFFT (Fn206)
• Automatic offset-signal adjustment of motor current detection signal (Fn00E)
(7) Servo Ready Output (/S-RDY)
The servo ON command will not be accepted in the HWBB state. Therefore, the servo ready output will turn
OFF.
The servo ready output will turn ON if the servo OFF command is input when both the /HWBB1 and
/HWBB2 signals are ON.
The following diagram shows an example where the main circuit power is turned ON and no servo alarm
occurs.
/HWBB1
/HWBB2
Command from
host controller
SERVOPACK
state
/S-RDY
(8) Brake Signal (/BK)
When the /HWBB1 or /HWBB2 signal is OFF and the HWBB function operates, the brake signal (/BK) will
turn OFF. At that time, Pn506 (Brake Reference - Servo OFF Delay Time) will be disabled. Therefore, the lin-
ear servomotor may be moved by external force until the actual brake becomes effective after the brake signal
(/BK) turns OFF.
Note: The brake signal output is not related to safety functions. Be sure to design the system so that the system will not be
put into danger if the brake signal fails in the HWBB state.
(9) Dynamic Brake
If the dynamic brake is enabled in Pn001.0 (Servomotor Power OFF or Alarm Gr.1 Stop Mode), the linear ser-
vomotor will come to a stop under the control of the dynamic brake when the HWBB function works while the
/HWBB1 or /HWBB2 signal is OFF.
Note: The dynamic brake is not related to safety function. Be sure to design the system so that the system will not be put
into danger if the linear servomotor coasts to a stop in the HWBB state. Usually, use a sequence in which the HWBB
state occurs after the linear servomotor is stopped using a command.
If the application frequently uses the HWBB function, do not use the dynamic brake to stop the linear servomotor, or
otherwise element deterioration in the SERVOPACK may result. Use a sequence in which the HWBB state occurs
after the linear servomotor has come to a stop.
OFF
ON
(requests HWBB function)
Servo ON command
Operating HWBB state
OFF
ON
CAUTION
ON
Servo OFF command
BB state
ON
4.7 Safety Function
4
4-45