YASKAWA yasnac i80m Instruction Manual page 94

2.6
REFERENCE POINT RETURN
(Cont'd)
©
'
Tool length offset can
be
canceled by G28 command. Whether or
not
it should be canceled
is specified by
a
parameter.
This, specification is
only
effective when Z-axis command is
present
in the
same
block
as
G2S.
Table 2.6.2
Selection of Cancel in Tool Length Correction
Movement Parameter Pm4U10 D7
Tool length offset is canceled during
reference
point return at reset.
The H code is cleared
to
"0."
However, tool length offset G code is
retained.
0
Tool length offset is
not
canceled during reference point
return at reset.
The If code and tool length offset G code are retained.
if
an
offset is already specified, be sure
to
cancel the
offset
before
issuing
the G2S command.
1
©
Reference
point
return
valid/invalid
can
be selected for each axis. If reference point
restore
invalid is instructed for an
axis in the G28 block,
alarm "341"
results. Refer
to
parameters
Pm4002 DO
to
D4.
©
When
a cycle is
started
after power-on without performing
all axis reference point restore.
alarms "0411"
to
"0415"
can
be issued. Whether
or
not
such alarms should be issued is selected
by a
parameter.
For details, refer
to parameter
F'in-KXil DH.
If
set
for "no
alarm"
in the
above, whether
or
not
reference point
restore
is required can be
specified for
each axis
with
a
parameter.
For details, refer
to parameters
I'mtOlS DO
to
D4.
©
When
any
move command other
than G28 is executed after
power-on without performing
reference
point
return,
alarms "0091"-"iXi99"
can
be issued. Whether
or
not
such alarms
should be issued is specified by a
parameter.
For details,
refer
to parameters
I'm-IOfi-l P0-
D7 and
Fni4l)05 Du.
©
The absolute coordinate value of the axis instructed by the G28 block is stored in
memory
as an
intermediate point. For axes
not
instructed by the G28 block, the intermediate
point
of the previously. instructed
G28 is
stored in
memory as
the intermediate point for that axis.
©
If M. S. T
or
B command is made in the same block as G28, the machine is moved
to
the
reference point regardless
of whether FIN
processing is
completed or not.
Therefore. DEN
output
is made
at
the reference point.
©
Reference
point
return
and
machine lock intervention
There are
twu types
of machine lock intervention
operations: machine lock is turned ON
after the machine is
stopped by
feed
hold during
movement
or
the machine
lock
is turned OFF
after the machine is stopped by feed hold once again.
Table
2. 6.
3 shows how
the
machine is operated by machine lock intervention.
70
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