Mitsubishi Melsec-Q QD75D1, User Manual

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Appendix - 126
MELSEC-Q
APPENDICES
NC LANGUAGE (Numerical Control
Language)
This is the language punched into the paper
tape that instructs the machining to the NC
module.
The NC language consists of EIA codes (EIA
language), ISO codes (ISO standards), and
JIS codes (JIS standards).
NEAR-POINT DOG
This is a switch placed before the OP. When
this switch turns ON, the feedrate is changed
to the creep speed. Because of that, the time
that this switch is ON must be long enough to
allow for the time required for deceleration
from the feedrate to the creep speed.
ON OFF
Feedrate
Creep speed
Time
Near-point dog
NEW CURRENT VALUE (CURRENT VALUE
CHANGING)
The QD75 has no way of knowing the current
value when the machine is assembled and the
positioning module is connected, so this
function is used to teach it a temporary
approximate value as the current value. This
function can also be used to write a temporary
current value when the current value has been
lost due to accidents, etc. If an OPR is carried
out after that, the positioning module will
recognize the zero point.
To prevent the accumulated value from
exceeding the stroke limit in fixed-feed, etc.,
rewrite the current value to 0 after the fixed-
feed. The current value can be changed during
a positioning stop.
OP
This is the reference position for positioning.
Positioning cannot start without a reference
point.
The OP is normally set to the upper or lower
stroke limit.
OP
This point is the reference.
OP SHIFT FUNCTION
The OP position can be shifted in the positive
or negative direction by executing a machine
OPR and determining the shift amount from
the machine OPR complete position.
An OP can be set at a position besides the OP
position, or outside the dog switch.
OPERATION PATTERN
The kind of operation to be carried out after
executing the positioning data is determined.
1) If "POSITIONING COMPLETE" is selected,
the operation will stop after the positioning
is complete.
2) If "CONTINUOUS POSITIONING
CONTROL" is selected, the next data No.
will be automatically executed after the
positioning is complete.
3) If "CONTINUOUS PATH CONTROL" is
selected, the positioning will not be
completed. Only the speed will be
automatically changed, and the next data
No. will be executed.
OPR METHOD
The OPR methods are shown below. The
method used depends on the machine
structure, stopping accuracy, etc.
OPR can be carried out when the OPR
parameters are written.
1) Near-point dog method
2) Stopper method
3) Count method