11.2 Hard Wire Base Block (HWBB)
11.2.7 /S-RDY (Servo Ready Output) Signal
11-6
11.2.7
/S-RDY (Servo Ready Output) Signal
The /S-ON (Servo ON) signal will not be acknowledged in the HWBB state. Therefore, the
Servo Ready Output Signal will turn OFF. The Servo Ready Output Signal will turn ON if both
the /HWBB1 and /HWBB2 signals are ON and the /S-ON signal is turned OFF (BB state).
The following example is for when a servo alarm does not occur when the main circuit power
supply is turned ON.
11.2.8
/BK (Brake Output) Signal
If the HWBB operates when the /HWBB1 or /HWBB2 signal is OFF, the /BK (Brake) signal will
turn OFF. At that time, the setting in Pn506 (Brake Reference - Servo OFF Delay Time) will be
disabled. Therefore, the Servomotor may be moved by external force until the actual brake
becomes effective after the /BK signal turns OFF.
/HWBB1
/HWBB2
ON (normal
operation)
/S-ON
(Servo ON
Input Signal)
SERVOPACK
Status
/S-RDY
(Servo Ready
Output Signal)
ON
OFF
ON
Operating
Status
HWBB state
BB state
ON
OFF
OFF (motor current
shut-OFF request)
ON (normal
operation)
CAUTION
The brake signal is not a safety-related element. You must design the system so that a haz-
ardous condition does not occur even if the brake signal fails in the HWBB state. Also, if a
Servomotor with a Brake is used, keep in mind that the brake in the Servomotor is used only
to prevent the moving part from being moved by gravity or an external force and it cannot
be used to stop the Servomotor.