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14. ABSOLUTE POSITION DETECTION SYSTEM
14.5 Startup procedure
(1) Connection of a battery unit
(2) Parameter setting
Set "1
"in DRU parameter No. 1 of the servo amplifier and switch power off, then on.
(3) Resetting of absolute position erase (A.25)
After connecting the encoder cable, the absolute position erase (A.25) occurs at first power-on. Leave
the alarm as it is for a few minutes, then switch power off, then on to reset the alarm.
(4) Confirmation of absolute position data transfer
After making sure that the ready (RD
) output after the servo-on (SON ) had turned on has turned
on, read the absolute value data with the serial communication function.
(5) Home position setting
The home position must be set if:
(a) System setup is performed;
(b) When the drive unit or interface unit is replaced;
(c) The servo motor has been changed; or
(d) The absolute position erase (A.25) occurred.
In the absolute position system, the absolute position coordinates are made up by making home
position setting at the time of system setup.
The motor shaft may misoperate if positioning operation is performed without home position setting.
Always make home position setting before starting operation.
For the home position setting method and types, refer to Section 14.6.3.