Omron CS1W-MCH71 Operation Manual page 588

ABS Encoder Origin Setting
8-6-4 Supplemental Information for Setting Up
Note
Setting Up for Trial
Operation
Note
Setting Up When
Replacing the Battery unit
Other Cases Requiring
Setup
8-6-5 Moving to the Origin
Performing an Origin Search
1,2,3...
Jog Operation Without Performing an Origin Search
1,2,3...
8-6-6 Setting the MC Unit ABS Origin
Setup operation explained above is required for operation check (with no load)
on a motor and driver alone. When connecting the motor with the mechanical
system for trial operation, another setup will be required due to the possibility
that the amount of multi-turns in the ABS encoder may be too great .
The output range of the ABS encoder multi-turns for OMNUC W Series is
between − 32768 to +32767. Make sure that the operation range of the
machine is within the range of multi-turns output.
• If the alarm (A.81) occurs after replacing the battery unit, another setup
will be required.
• The multi-turn data after the replacement should be different from that
before battery unit replacement. Therefore, another initialization of the
MC Unit will be required.
If the alarm does not occur after battery unit replacement, it is not necessary
to initialize the MC Unit. If the battery unit is replaced correctly before its bat-
tery drain, no alarm should occur normally.
In case of battery drain, the absolute data in the ABS encoder will be cleared.
Therefore, battery unit replacement and setup are required.
When disconnecting the encoder cable from the connector (on the driver or
motor), the absolute data in the ABS encoder will be cleared. Therefore, setup
operation will be required again.
Use either of the following methods to move the machine to the position that
will be the origin.
• Perform an origin search
• Execute JOG operation without an origin search.
1. Set the system in Servo Lock.
2. Perform an origin search. See 8-4 Origin Search Operations (page 536) for
details on the origin search.
1. Set the system in Servo Lock
2. Move the axis to the position to be the origin by JOG operation.
By setting the ABS origin, while the present position on the machine coordi-
nate system is cleared to zero, the absolute position at that point is stored in
the Flash memory.
Execute ABS origin setting after the axis was moved to the origin.
The present position (stopping) is stored in the MC Unit as the absolute origin.
Section 8-6
543