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

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Present Position Preset Section 8-3
8-3-1 Outline of Operation
When the PRESENT POSITION PRESET Bit is turned ON, the present posi-
tion is changed to the value set as the position command value in the Axis
Operating Output Memory Areas. during present position preset, the Busy
Flag is ON (1 cycle time min.). The Busy Flag turns OFF to indicate that pre-
set operation has been completed. After this, the origin is established. If the
present position is changed to “0,” then that position will become the origin.
8-3-2 Data Settings for Present Position Preset
A simple explanation of the main parameters and data used to execute
PRESENT POSITION PRESET is provided here. For details on command
units, refer to
7-2 Control Units .
The setting units for parameters and data depend on the specified command
unit.
Servo Parameter Area Command Unit Parameters
The command unit default setting is pulses.
Axis Operating Output Memory Areas (Operating Commands)
a = Beginning word of Axis Operating Output Areas specified in Common
Para (Axis No.
−
1)
×
25
Present position preset is performed according to the position command value
set in the Axis Operating Output Memory Area and started when the
PRESENT POSITION PRESET Bit turns ON.
Model Parameter
No.
Parameter name Unit Setting
range
Parameter
size
Default
setting
R88D-GN
@
-
ML2
Pn205 Electronic gear ratio G1 (numerator) --- 1 to
1073741824 4 1
Pn206 Electronic gear ratio G2 (denominator) --- 1 to
1073741824 4 1
R88D-WT @ Pn202 Electronic gear ratio G1 (numerator) --- 1 to 65535 2 4
Pn203 Electronic gear ratio G2 (denominator) --- 1 to 65535 2 1
R88D-WN
@
-
ML2
Pn20E Electronic gear ratio G1 (numerator) --- 1 to
1073741824 4 4
Pn210 Electronic gear ratio G2 (denominator) --- 1 to
1073741824 4 1
SMART-
STEP Junior Pn20E Electronic gear ratio G1 (numerator) --- 1 to
1073741824 4 1
Pn210 Electronic gear ratio G2 (denominator) --- 1 to
1073741824 4 1
Name Word Bits Contents
PRESENT POSITION
PRESET a 08 0
→
1: Starts present position preset
Position command value a+2
a+3 --- Position command value (rightmost
word)
Position command value (leftmost
word)
Unit: Command unit
Command range:
−
2,147,483,648 to
2,147,483,647 (80000000 hex to
7FFFFFFF hex)