Resetting The Hwbb State - YASKAWA SGD7S Product Manual

11.2 Hard Wire Base Block (HWBB)

11.2.3 Resetting the HWBB State

11.2.3 Resetting the HWBB State

Normally, after the SV_OFF (Servo OFF: 32 hex) command is received and power is no longer
supplied to the Servomotor, the /HWBB1 and /HWBB2 signals will turn OFF and the SERVO-
PACK 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: 31 hex) command.
/HWBB1
/HWBB2
MECHATROLINK-III
command
Servo command
status
SV_ON
Servo command
input signal monitor
ESTP
SERVO-
PACK Status
If the /HWBB1 and /HWBB2 signals are OFF and the SV_ON (Servo ON: 31 hex) 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: 32 hex) command to place the SERVOPACK in the
BB state and then send the SV_ON (Servo ON: 31 hex) command.
MECHATROLINK-III
command
Servo command
status
SV_ON
Servo command input
signal monitor
ESTP
SERVOPACK
Status
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: 32 hex) command is received.
11-6
OFF (motor current
shut-OFF request)
SMON or
other command
0
1
HWBB state
OFF (motor current
/HWBB1
shut-OFF request)
/HWBB2
SV_ON command
0
1
HWBB state
ON (normal operation)
SV_ON command
1
0 0
Operating Status
BB state
ON (normal operation)
SV_OFF SV_ON
command command
0
1
0 0
Operating
BB state
Status