Omron CS1W-MC221 -, Operation Manual

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Setting the Origin With an Absolute Encoder Section 9-6
If a reference origin offset value has been preset, the axis is moved for the
value preset.
Note Previous MC Units can perform an origin search with an Incremental Encoder
but not with an Absolute Encoder. The CS1W-MC421/221 can perform an ori-
gin search with either an Absolute Encoder or an Incremental Encoder.
Jogging Without Performing an Origin Search.
1,2,3... 1. Set the system to the servo-lock state.
At this point, the MC Unit will read the absolute position from the Absolute
Encoder. The absolute data read will be used to determine a tentative ori-
gin.
2. Move the axis to the origin by jogging.
9-6-4 Setting the MC Unit Absolute Origin
By setting the absolute origin, the present position is cleared to zero and the
absolute position at that time is stored as the absolute position setting (in the
machine parameters). Then the present system parameters are stored in the
flash memory.
1,2,3... 1. Set the absolute origin after the MC Unit is moved to the origin.
The present position is stored as the absolute origin in the MC Unit. Exe-
cute the absolute origin setting from the PLC Interface Area or the Teach-
ing Box. Refer to page 291
Absolute Origin Setting for information on how
to execute the absolute origin setting from the PLC Interface Area.
Execute the absolute position setting from the Teaching Box by selecting
“5.Absolute origin setting” from the extension mode menu. Refer to the
Teaching Box Operation Manual (W320) for details on how to execute ab-
solute position setting from the Teaching Box.
Note The above operation can also be executed with the system set to the
servo-unlock state.
2. Back up the system parameters using CX-Motion after the absolute origin
setting is completed. The set values can be rewritten by downloading the
system parameters again.
The Absolute Encoder initial settings can be displayed using the IORD
instruction or CX-Motion, but they cannot be changed.
!Caution
Back up the system parameters using CX-Motion after the absolute origin set-
ting is completed.
!Caution
When editing system parameters, be sure to edit them after they have been
uploaded from the MC Unit. Otherwise, the absolute data will change when it
is downloaded, thus causing position errors.
!Caution Do not execute the absolute origin setting while system parameters are being
downloaded. Otherwise, the Absolute Encoder initial settings will not be
stored properly.
Name Model Word Bit Description
X axis Y axis Z axis U axis
Absolute
Origin
Setting MC421
MC221 n+11
n+7 n+13
n+9 n+15
--- n+17
--- 06
↑
: Absolute origin setting is
executed.