Mitsubishi A1SD75P1-S3, User Manual

Page: 581 / 622

Appendix - 34
MELSEC-A
APPENDICES
HIGH-SPEED MACHINE ZERO POINT
RETURN
In this zero point return method the near-point
dog is not detected. The positioning data
address is replaced with the machine zero
point address, and the positioning data is
executed to carry out high-speed positioning to
the zero point at a designated speed.
(This is not validated unless a machine zero
point return has been carried out first.)
Positioning data command speed
Zero point
Near-point dog switch
HIGH-SPEED ZERO POINT RETURN
The axis returns to the machine zero point at
the zero point return speed without detecting
the near-point dog.
(This is not validated unless a machine zero
point return has been carried out first.)
Zero point
Near-point dog switch
Zero point return speed
INCREMENT 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-
dimension feed, etc. Compare ABSOLUTE
SYSTEM.
No.1 No.2 No.3
0
0 0
Stop
Left
Right Right No. 2 is several millimeters
to the right of No. 1.
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 point signal.
The most commonly used incremental
encoders output between 100 and 10,000
pulses per axis rotation. Refer to "ENCODER".
A
B
A
Z
B
1
4
A signal slit
B signal slit
Slit disk
Light-emitting diode
Phototransistor
Zero signal slit
Rotating axis
1 pitch
pitch
Zero point signal
1 pulse per axis rotation
Output waveform 2-phase + zero point output
INERTIA
The property of an object, when not being
affected by external forces, where it tries to
maintain its current condition. The inertia
moment.
INPUT TERMINAL
This is a pin connector wired by the user for
inputting data to the AD75 from an external
source. It is connected to the motor drive unit
or machine side.
This terminal is used to output the following.
• DRIVE UNIT READY signal
• STOP signal
,etc.
The input No. Xn is not directly related to the
program, so it is not used.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com