Startup Procedure - Mitsubishi Electric Melservo MR-J3-A Instruction Manual

14. ABSOLUTE POSITION DETECTION SYSTEM

14.6 Startup procedure

(1) Battery installation.
Refer to section 14.3 installation of absolute position backup battery.
(2) Parameter setting
Set " 1"in parameter No.PA03 of the servo amplifier and switch power off, then on.
(3) Resetting of absolute position erase (AL.25)
After connecting the encoder cable, the absolute position erase (AL.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
When the servo-on (SON) is turned on, the absolute position data is transferred to the programmable
controller. When the ABS data is transferred properly:
(a) The ready output (RD) turns on.
(b) The programmable controller/ABS data ready contact turns on.
(c) The servo configuration software ABS data display window (refer to section 14.11) and programmable
controller side ABS data registers show the same value (at the home position address of 0).
If any warning such as ABS time-out warning (AL.E5) or programmable controller side transfer error
occurs, refer to section 14.9 or chapter 9 and take corrective action.
(5) Home position setting
The home position must be set if:
(a) System setup is performed;
(b) The servo amplifier has been changed;
(c) The servo motor has been changed; or
(d) The absolute position erase (AL.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 14.7.3.
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