11.2 Hard Wire Base Block (HWBB)
11.2.7 /S-RDY (Servo Ready Output) Signal
11-7
11
S
afety Function
s
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).
An example is provided below for when the main circuit power supply is ON and the SEN signal
turns ON when there is no servo alarm. (An absolute encoder is used in this example.)
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
(
S
ervo ON
Input
S
ignal)
S
ERVOPACK
S
tatu
s
/
S
-RDY
(
S
ervo Ready
Output
S
ignal)
ON
OFF
ON
Operating
S
tatu
s
HWBB
s
tate
BB
s
tate
ON
OFF
OFF (motor current
s
hut-OFF reque
s
t)
ON (normal
operation)
S_Analog
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.