149
6-5-18 Word n+5 Bit 01: Origin Search Bit (X-axis)
This bit is used to perform a manual origin search. The origin search begins
when the Origin Search Bit goes from OFF to ON (up-differentiation). Overrides
are ignored in manual origin searches.
If a reference origin offset is specified in the system parameters, the axis will be
moved that distance from the mechanical origin by PTP control after the
mechanical origin is detected. At this point, overrides are valid using the maxi-
mum high-speed feed rate, acceleration time, and deceleration time. The posi-
tion after the movement becomes the origin of the reference coordinate system.
This bit is ignored when the X-axis’ Busy Flag (n+16 bit 01) is ON. The origin
search operation will be stopped if the Origin Search Bit is turned OFF while the
search is in progress. Keep this bit ON until the X-axis’ No Origin Flag (n+16 bit
03) is turned OFF.
When the “Origin Search Method” machine parameter has been set to “Set ori-
gin at power ON” with the MC Support Software, that position will be the origin for
manual origin searches.
An Origin Return Operation will be performed for axes set for absolute operation.
The Origin Search Bits for the Y axes (bit 01 in word n+7) operate in the same
way.
Signal The Origin Search Bit settings have the following functions.
Signal Function
↑ (OFF-to-ON) Starts the origin search.
↓ (ON-to-OFF) Stops the origin search if it is in progress.
Timing Chart
20 ms
min.
20 ms
min.
Axis operation
Busy Flag
(n+16 bit 01)
Origin search
Origin search Bit
(n+5 bit 01)
No Origin Flag
(n+16 bit 03)
Program Example 1 The following example is for incremental operation.
DIFU(13) R1
DIFU(13) R2
n+5
01
n+5 01
Origin Search BIt
R2
n+11 03
Manual
Mode Flag
Task
Error
Flag
n+11 00n+16 02
Servo Lock
ON Flag
OUT
(Starts the
origin
search.)
Auxiliary
Area Bit
Auxiliary
Area Bit
R1
Origin Search condition
No Origin Flag
n+16 03
Interface Bit Specifics
Section 6-5
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