Mitsubishi QD75P1N User Manual page 809

APPENDICES
FLS SIGNAL (forward limit signal)
This is the input signal that notifies the user
that the limit switch (b contact configuration,
normally ON) installed at the upper limit of the
positioning control enabled range has been
activated.
The positioning operation stops when the FLS
signal turns OFF (non-continuity).
G CODE
These are standardized (coded) 2-digit
numerical values (00 to 99) designating
various control functions of the NC module.
Also called G functions.
Example :
G01 Linear interpolation
G02 Circular interpolation CW (clockwise)
G04 Dwell
G28 OPR
G50 Max. spindle speed setting
GAIN
The changing of the ratio between two values
having a proportional relation. Seen on a
graph, the changing of the incline of the
characteristics.
13
10
Output
2
Input
For example, when 10 is output for an input of
10, the output can be changed to 12, 5, etc.,
by changing the gain.
2
GD
The inertia moment. The sum total of the mass
(dm) of each small area configuring an object
multiplied by the square of the distance (r) of
each of those areas from a given straight line.
The relation with I = r
with "g" being gravitational acceleration.
Raising
the gain
Lowering
the gain
10
2 2
dmGD is given by 4gI,
INCREMENTAL ENCODER
A device that simply outputs ON/OFF pulses
by the rotation of the axis. 1-phase types
output only A pulses, and do not indicate the
axis rotation direction. 2-phase types output
both A and B pulse trains, and can judge the
rotation direction. The direction is judged to be
forward if the B pulse train turns ON when A is
ON, and judged to be reverse if A turns ON
when B is ON. There is also another type of
incremental encoder with a zero signal. The
most commonly used incremental encoders
output between 100 and 10,000 pulses per
axis rotation. Refer to "ENCODER".
A signal slit
Slit disk
Phototransistor
Rotating axis
INCREMENTAL SYSTEM
The current value is 0 in this system. Positions
are expressed by the designated direction and
distance of travel. Also called the relative
address system. This system is used in fixed-
feed, etc. Compare ABSOLUTE SYSTEM.
Stop
0
Right
INERTIA
The property of an object, when not being
affected by external forces, where it tries to
maintain its current condition. The inertia
moment.
Appendix - 123
MELSEC-Q
B signal slit
Light-emitting diode
A
B
Z
Zero signal slit
1 pitch
A
1
pitch
4
B
Zero signal
Output waveform 2-phase + OP output
No.1
0
Right No. 2 is several millimeters
to the right of No. 1.
1 pulse per axis rotation
No.2 No.3
0
Left