YASKAWA Sigma-V Series User Manual page 148

(3) Resetting the HWBB State
Usually after the servo OFF command (SV_OFF: 32H) is received and the servomotor power is OFF, the
SERVOPACK will then enter a hard wire baseblock (HWBB) state with the /HWBB1 and /HWBB2 signals
turned OFF. By then turning the /HWBB1 and /HWBB2 signals ON in this state, the SERVOPACK will enter
a baseblock (BB) state and can accept the servo ON command (SV_ON: 31H).
/HWBB1
/HWBB2
M-II
Command
Status field
SVON
IO monitor field
HBB
SERVOPACK
state
If the /HWBB1 and /HWBB2 signals are OFF and the servo ON command is received, the HWBB state will
be maintained after the /HWBB1 and /HWBB2 signals are turned ON.
Send the servo OFF command, and the SERVOPACK is placed in a BB state. Then send the servo ON com-
mand again.
/HWBB1
/HWBB2
M-II
Command
Status field
SVON
IO monitor field
HBB
SERVOPACK state
Note: Even if the servomotor power is turned OFF by turning OFF the main circuit power, the HWBB status is retained
until a servo OFF command is received.
OFF
(Motor current
shut-off request)
SMON
Command, etc.
0
1
HWBB state
OFF
(Motor current
shut-off request)
(Normal operation)
SV_ON
Command
0
1
HWBB state
ON
(Normal operation)
SV_ON
Command
0 1
0 0
BB state Operation
ON
SV_OFF SV_ON
Command Command
0
1
M-II
0 0
BB state Operation
4.8 Safety Function
M-II
4
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