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14. ABSOLUTE POSITION DETECTION SYSTEM
14.6 Absolute position data transfer protocol
14.6.1 Data transfer procedure
Every time the servo-on (SON
)
turns on at power-on or like, the controller must read the current
position data in the drive unit. Not performing this operation will cause a position shift.
Time-out monitoring is performed by the controller.
MELSERVO-J2M
Controller
Watch dog timer
Absolute position
data acquisition
SON ON
RD ON
Absolute position data
command transmission
Command [0][2] data No.[9][1]
Absolute position data return
Position command start
Current position
acquisition
Current value
change