Omron CJ1W-MA - REV 10-2008, Operation Manual

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Present Position Preset Section 8-3
Axis Parameters The following parameters are used to set the origin search operation mode.
d = 1860 hex + (Axis No.
−
1)
×
14 hex
The position command value set in the Axis Operating Output Memory Areas
is used as the preset value to be set after completing an origin search.
Axis Operating Output
Memory Areas (Operating
Commands)
a = Beginning word of Axis Operating Output Areas specified in Common
Para (Axis No.
−
1)
×
25
The position command value that is set when the ORIGIN SEARCH com-
mand bit turns ON is used as the origin search preset.
The origin search preset operation is executed only after the origin search
operation has been completed normally, i.e., when positioning for the final
travel distance to return to zero point has entered the positioning completion
range after the origin signal has been detected.
If an absolute encoder is used, the origin search operation is set to reversal
mode 1, and the origin search preset is enabled, a zero point position offset
for the absolute encoder can be automatically set. Refer to
8-6-5 Absolute
Encoder's Origin (Zero Point) Position Offset Setting for details.
Note The origin search preset function of the Position Control Unit cannot be used
with the function block for origin searches in the OMRON FB Library
(_NCF05
@ _Home) if the Library is version is 1.13 or lower. Use the present
value preset function provided in the library. To use the origin search function
block and enable the origin search preset, the OMRON FB Library with a ver-
sion higher than 1.13 must be used.
8-3 Present Position Preset
PRESENT POSITION PRESET changes the present position to any position
and then establishes the origin.
PCU's
address
Contents Setting
15 to 14 13 12 11 to 08 07 to 04 03 to 00
d+1 0 (fixed) Origin
search
preset Origin
search
direction Origin
detection
method Origin
search
operation 0 (fixed) Bit 13: Origin Search Preset
0: Do not set the present position to
the preset position after complet-
ing the origin search (default set-
ting).
1: Set the present position to the pre-
set position after completing the
origin search.
Name Word Bits Contents
Position command value a+2
a+3 --- Position command value (rightmost
word)
Position command value (leftmost
word)
Unit: Command units/s
Command range:
−
2,147,483,648 to
2,147,483,647 (80000000 hex to
7FFFFFFF hex)
This value is also used as the preset
value when a preset value is being set
after completing an origin search.