Mitsubishi Electric Q172CPU Programming Manual page 460

8 AUXILIARY AND APPLIED FUNCTIONS
POINTS
(1) The address setting range of absolute position system is −2147483648 to
2147483647.
It is not possible to restore position commands that exceed this limit, or current
values after a power interruption.
Correspond by the [degree] setting for an infinite feed operation.
(2) Even when the current value address is changed by a current value change
instruction, the restored data for the current value after a power interruption is
the value based on the status prior to execution of the current value change
instruction.
(3) When home position return has not been completed (home position return
request is ON), restoration of the current value after a power interruption is not
possible.
(3) The current value history can be monitored using of the "System setting mode-
allowable travel during power off" or "Monitor mode" using a peripheral device.
(Refer to the help of SW6RN-GSV43P "Allowable travel during power off" and
"Monitor mode".)
(a) Current value history monitor
Month/day/hour/minute
The time such as at the completion of home position return and servo
amplifier power supply ON/OFF is indicated.
In order to indicate the time correctly, turn on M9028 (Clock data read
request) in the Motion program after setting the clock data of special
register.
(b) Encoder current value
The multiple revolution data and within-one-revolution data read from the
encoder is indicated, when using the MR-H BN (22kW or less) [Ver. BCD-
B13W000-B2 or later], MR-J2- B [Ver. BCD-B20W200-A1 or later] or MR-
H BN (30kW or more)/MR-H BN4/MR-J2S- B/MR-J2M-B/MR-J2-03B5
(No restriction).
(Note) : For the encoder current value in the home position data area, the
encoder current value when the motor is within the in-position
range at the completion of home position return is displayed (not
encoder value of home position).
(c) Servo command value
The command value issued to the servo amplifier is indicated.
(d) Servo command value
The current value controlled in the Motion CPU is indicated.
(Note) : A value near the machine value is indicated. However, because the
monitor current value and machine value are different data, it is not
abnormal even if a different value is indicated.
8 - 13