Omron CS1W-MCH71 MOTION CONTROL UNIT - 09-2004 Manual page 516

Origin Search Methods and Parameters
3-level Speed in One
Direction Mode
8-3-2 System Parameters
Parameter No.
Origin search P4AA01
method
Initial search direc- P4AA02
tion
Phase-Z detection P4AA03
direction
Origin deceleration P4AA04
method
Origin determine sig- P4AA06
nal
Origin search feed P4AA07
rate
• The origin search is performed only in one direction.
• After starting the operation towards the phase-Z detection direction at Ori-
gin search feed rate, the speed will be changed to Origin search approach
speed when the Origin proximity signal input (normally open) is turned
ON. The speed will be changed to the Origin search creep speed at the
rise of the Origin determine signal input after the Origin proximity input
signal is turned OFF and the axis travels for the final travel distance to
define an origin.
• An alarm will occur if a Limit input signal is input before the Origin proxim-
ity input signal.
• When there is no Origin proximity input signal, a limit input signal can be
used instead.
The following system parameters are required to perform the origin search
operation. These system parameters are set using the support tool.
• Except for "Origin at power ON" mode, the origin on the machine coordi-
nate system is determined with the external input signal specified in the
parameter [P4AA06: Origin determine signal].
• After completion of an origin search, the following values remain the same
as before the execution.
• The workpiece coordinate system offset set using OFFPOS command
• The coordinate system No. set in ORIGIN/WORK command
• If an origin search is executed for an axis using an absolute encoder, the
origin on the machine coordinate system will be determined using an
external input signal.
• By specifying Origin offset value, the origin on the machine coordinate
system after an origin search can be set to the value other than zero.
(Specify zero if not necessary.)
Value
0: Origin at power ON
1: Limit reversal
2: 2-level speed in one direction
3: 3-level speed in one direction
0: Same as phase-Z detection
1: Opposite of phase-Z detection
0: + direction
1: − direction
0: Uses origin proximity
1: Uses CW/CCW
0: Phase-Z
1: External input signal 1
2: External input signal 2
3: External input signal 3
1 to 2147483647
Note Note that the speed is lim-
ited by 32767 command
unit/unit scan.
Description
Sets the origin search method.
Sets the origin search start direction in Limit rever-
sal mode (origin search method 1).
Sets the phase-Z detection direction in the modes
(origin search methods 1,2, and 3) except for Ori-
gin at power ON mode.
Sets whether to use origin proximity or limit input
signal as the origin proximity signal for origin
search methods 1 and 3.
Sets the signal that determines the origin.
st
Sets the 1 level speed of the 3-level speed origin
search.
Section 8-3
493