Hard Wire Base Block (Hwbb) State; Resetting The Hwbb State - YASKAWA SGD7S Product Manual

11.2 Hard Wire Base Block (HWBB)

11.2.2 Hard Wire Base Block (HWBB) State

• If a failure occurs such as a Power Module failure, the Servomotor may move within an elec-
tric angle of 180°. Ensure safety even if the Servomotor moves.
The rotational angle or travel distance depends on the type of Servomotor as follows:
• Rotary Servomotor: 1/6 rotation max. (rotational angle calculated at the motor shaft)
• Direct Drive Servomotor: 1/20 rotation max. (rotational angle calculated at the motor shaft)
• Linear Servomotor: 50 mm max.
• The HWBB does not shut OFF the power to the SERVOPACK or electrically isolate it. Imple-
ment measures to shut OFF the power supply to the SERVOPACK before you perform main-
tenance on it.

11.2.2 Hard Wire Base Block (HWBB) State

The SERVOPACK will be in the following state if the HWBB operates. If the /HWBB1 or
/HWBB2 signal turns OFF, the HWBB will operate and the SERVOPACK will enter a HWBB
state.
/HWBB1
/HWBB2
/S-ON
(Servo ON
Input Signal)
SERVOPACK
Status

11.2.3 Resetting the HWBB State

Normally, after the /S-ON (Servo ON) signal is turned OFF and power is no longer supplied 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 /S-ON
signal.
/HWBB1
/HWBB2
/S-ON (Servo
ON Input Signal)
SERVOPACK
Status
If the /HWBB1 and /HWBB2 signals are OFF and the /S-ON (Servo ON Input) signal is input,
the HWBB state will be maintained even after the /HWBB1 and /HWBB2 signals are turned
ON. Turn OFF the /S-ON signal to place the SERVOPACK in the BB state and then turn ON the
/S-ON signal again.
/HWBB1
/HWBB2
/S-ON (Servo
ON Input Signal)
SERVOPACK
Status
Note: 1. If the SERVOPACK is placed in the BB state while the main circuit power supply is OFF, the HWBB state
2. If the /S-ON (Servo ON) signal is set to be always active (Pn50A = n.7), you cannot reset the HWBB
11-4
ON (normal operation)
ON
Operating state
OFF (motor current
shut-OFF request)
HWBB state
OFF (motor current
shut-OFF request)
ON
HWBB state
will be maintained until the /S-ON (Servo ON) signal is turned OFF.
state.
Do not set this value if you are using the HWBB.
OFF (motor current shut-OFF request)
OFF
BB state HWBB state
ON (normal operation)
OFF
BB state
ON (normal operation)
OFF
BB state
ON
Operating Status
ON
Operating
Status