Yaskawa Sigma-5 User Manual: Design and Maintenance - Linear Motors MECHATROLINK-III Communications Reference - Manual (Page 140)

4 Operation
4.9.1 Hard Wire Base Block (HWBB) Function
4-52
(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).
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.
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
ON
(Normal operation)
1 0
0 0 1
SMON
Command, etc. SV_ON
Command
HWBB state BB state Operation
(Motor current shut-off request.)
/HWBB1
/HWBB2
M- III command
Servo command
status SV_ON
Servo command input
signal monitoring ESTP
SERVOPACK
state
M-III
/HWBB1
/HWBB2
OFF
(Motor current
shut-off request)
ON
(Normal operation)
Servo command
status SV_ON
Servo command
input signal
monitoring ESTP
SERVOPACK state HWBB state BB state Operation
SV_ON
Command SV_ON
Command
0
1 0
0
0
1
M- III
Command
SV_OFF
Command
M-III