Absolute Position System - Mitsubishi Electric Q Series Programming Manual

4 AUXILIARY AND APPLIED FUNCTIONS

4.2 Absolute Position System

The positioning control for absolute position system can be performed using the
absolute-position-compatible servomotors and servo amplifiers.
If the machine position is set at the system starting, home position return is not
necessary because the absolute position is detected at the power on.
The machine position is set with the home position return using the Motion SFC
program (SV13/SV22)/Motion program (SV43) or MT Developer2.
(1) Conditions of the absolute position system start
Perform a home position return after machine adjustment at the absolute position
system start.
(2) In the absolute positioning system, the absolute position may be lost in the
following cases:
Set the absolute position with a home position return.
(a) The battery unit is removed or replaced.
(b) The battery error of the servo amplifier occurs. (It is detected at the servo
amplifier power on).
(c) The machine system is disturbed by a shock.
(d) The cable between servo amplifier and encoder is removed, or the servo
amplifier or encoder is replaced.
(3) The current value history can be monitored using of the "System setting allowable
travel during power off" or "Monitor" using a MT Developer2.
(Refer to the help of MT Developer2 or details.)
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