Mitsubishi Melsec-Q QD75D1, User Manual

Page: 805 / 858

Appendix - 119
MELSEC-Q
APPENDICES
CREEP SPEED
A speed at which the machine moves very
slowly.
It is difficult for the machine to stop accurately
when running at high speed, so the movement
must first be changed to the creep speed
before stopping.
Refer to the term "NEAR-POINT DOG".
CURRENT FEED VALUE
The OP address at the completion of the
machine OPR is stored.
The position currently being executed is
stored.
This value changes when the current value is
changed.
CURRENT LOOP MODE
One of the servo control modes in positioning.
Mode which uses current for torque control.
Also called the torque loop mode.
Refer to the section of "position loop mode".
CURRENT VALUE
This is the current address (position) when
stopped or during positioning.
CW (Clockwise)
Rotation in the clockwise direction. Rotation in
the clockwise direction looking from the motor
shaft end side.
D/A CONVERTER (Digital-to-Analog
converter)
A device having a function to convert the
digital value expressing the No. of pulses to an
analog value expressing the voltage (or
current).
No. of pulses
0 to 80,000
pulses/second
D/A Voltage 0 to ±10V.
DATA NO.
To carry out positioning to 2 or more
addresses, each position is assigned a
sequence No. such as No. 1, No. 2, No. 3, etc.
The positioning is then carried out following
this sequence. The QD75 is capable of
positioning up to No. 600.
No.1
No.2
No.3
No.4
No.5
No.6
DECELERATION RATIO
A ratio used when the machine is decelerated
using a toothed gear. This ratio is a numeral
larger than 1.
Input gear speed
Deceleration
ratio
=
Output gear speed
DECELERATION TIME
The parameter deceleration time is the same
value as the acceleration time. Deceleration
time refers to the time from the speed limit
value to a stopped state, so it becomes
proportionally shorter as the setting speed
decreases.
Speed limit value
Setting speed
Speed 0
Deceleration time
Time