YASKAWA SGD7S-****20A Series - Resetting the HWBB State

11.2 Hard Wire Base Block (HWBB)
11.2.3 Resetting the HWBB State
11-6
11.2.3 Resetting the HWBB State
Normally, after the SV_OFF (Servo OFF: 32h) command is received and power is no longer sup-
plied to the Servomotor, the /HWBB1 and /HWBB2 signals will turn OFF and the SERVOPACK
will enter the HWBB state. If you turn ON the /HWBB1 and /HWBB2 signals in this state, the
SERVOPACK will enter a base block (BB) state and will be ready to acknowledge the SV_ON
(Servo ON: 31h) command.
If the /HWBB1 and /HWBB2 signals are OFF and the SV_ON (Servo ON: 31h) command is
received, the HWBB state will be maintained even after the /HWBB1 and /HWBB2 signals are
turned ON. Send the SV_OFF (Servo OFF: 32h) command to place the SERVOPACK in the BB
state and then send the SV_ON (Servo ON: 31h) command.
Note: If the SERVOPACK is placed in the BB state while the main circuit power supply is OFF, the HWBB state will
be maintained until the SV_OFF (Servo OFF: 32h) command is received.
/HWBB1
/HWBB2
10
001
OFF (motor current
shut-OFF request)
MECHATROLINK-III
command
Servo command
status
SV_ON
Servo command
input signal monitor
ESTP
SERVO-
PACK Status
HWBB state BB state
Operating Status
SMON or
other command
SV_ON command
ON (normal operation)
/HWBB1
/HWBB2
0
10
0
0
1
OFF (motor current
shut-OFF request)
MECHATROLINK-III
command
Servo command
status
SV_ON
Servo command input
signal monitor
ESTP
SERVOPACK
Status
HWBB state
BB state
Operating
Status
SV_ON command
SV_OFF
command
SV_ON
command
ON (normal operation)