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15. ABSOLUTE POSITION DETECTION SYSTEM
15.6 Startup procedure
(1) Battery installation.
Refer to Section 15.3 installation of absolute position backup battery.
(2) Parameter setting
Set "1
"in parameter No. 1 of the servo amplifier and switch power off, then on.
(3) Resetting of absolute position erase alarm (AL.25)
After connecting the encoder cable, the absolute position erase alarm (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 signal 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 (M3 for A1SD71, M99 for 1PG) turns on.
(c) The servo configuration software ABS data display window (refer to Section 15.9) and
programmable controller side ABS data registers (D3, D4 for A1SD71, D106, D107 for 1PG) 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 15.10 or Chapter 10 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 alarm (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 15.7.3.