YASKAWA SGDV series User Manual page 151

(2) Hard Wire Base Block (HWBB) State
The SERVOPACK will be in the following state if the HWBB function operates. If the /HWBB1 or /HWBB2
signal is OFF, the HWBB function will operate and the SERVOPACK will enter a hard wire baseblock
(HWBB) state.
The HWBB function operates after the servomotor power is turned OFF.
/HWBB1
/HWBB2
Reference from
option module
Motor power state
SERVOPACK
state
The HWBB function operates while the servomotor power is ON.
/HWBB1
/HWBB2
Motor power state
SERVOPACK
state
ON
(Normal operation)
[Servo ON command is
turned OFF.]
Not applied
Applied
Operation BB state
ON
(Normal operation) (Requests motor current shutoff.)
Applied
Operation
OFF
(Requests motor current shutoff.)
HWBB state
M-II
OFF
Not applied
HWBB state
4.7 Safety Function
4
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