Omron RX2 Series User Manual page 517

Position Memory at Power-Off
This function is used to set the current position to the current position monitor when the power supply of
an inverter is cycled after the position data is stored in EEPROM at inverter power-off. The home posi-
tion fixed with the homing function can be used after the power supply is cycled.
By setting the [AE-61] current position memory at power-off to 01, the current position data at power-off
can be stored.
Use this for the application where the shaft of the motor is locked at power-off.
Precautions for Correct Use
• For the machine of which the shaft idles at power-off, there is likely to be a gap between the
stored position and the current position when the power is turned on again.
• This function is used to provide memory for position when a power supply in a main circuit is
cut off. Note that the position when the power is cut off during the operation only in control
power supply at 24 V can not be stored.
• Motor's rotation at the power-off may cause a gap between the stored position and the cur-
rent position since the rotation amount is not counted. When the power supply of the inverter
is turned off, take the action to disallow the rotation with a brake.
• If the motor rotates after the power supply of the inverter is turned OFF, operate an inverter
after a homing position is determined with the homing function.
• Even if a brake stops the motor rotation at the power-off, there is likely a gap corresponding
to the backlash for the brake. The gap accumulates every power-off/on and ends up the
expansion. So, reset the gap once several times with the homing function.
Position Data Preset
When the 085[PSET] terminal is turned on, the current position monitor (can be monitored with [dA-20])
is overwritten with the value set to the [AE-62] preset position data.
Available for restarting in the middle of the positioning process, etc. (Data is overwritten at the ON edge
of the [PSET] terminal.)
High-function General-purpose Inverter RX2 Series User's Manual
8 Applied Settings
8 - 117
8