Appendix - 131
MELSEC-Q
APPENDICES
SFC (Sequential Function Chart)
A sequential function chart is a programming
method optimally structured for running a
machine's automatic control in sequence with
the programmable controller.
Start preparation
Start preparations OK
Execution of advance
operation servo program
Positioning complete
Execution of extrusion
operation servo program
Execution of retract
operation servo program
Positioning complete
Positioning complete
SKIP FUNCTION
When a SKIP signal is input, the positioning
being executed is interrupted, the motor is
deceleration stopped, and the next positioning
is automatically carried out.
SLAVE AXIS
During interpolation operation, the positioning
data is partially ignored on this side. This axis
is moved by the master axis data.
SPEED CONTROL
Speed control is mainly carried out with the
servomotor. It is an application for grindstone
rotation, welding speed, feedrate, etc. Speed
control differs from position control in that the
current position (address) is not controlled.
Drive units may differ, even when the same
motor is used.
SPEED INTEGRAL COMPENSATION
This is one item in the parameters of the servo
amplifier, and is used to raise the frequency
response during speed control to improve
transient characteristics.
When adjusting the speed loop gain, raising
this value is effective if the overshooting during
acceleration/deceleration remains large.
This compensation is set in ms units.
SPEED LIMIT VALUE
This is the max. speed for positioning. Even if
other data is mistakenly set to a higher speed
than this, the positioning will be carried out at
this speed limit value when it is set in the
parameters. The acceleration time becomes
the time to accelerate from a stopped state to
the speed limit value, and the deceleration
time becomes the time to decelerate from the
speed limit value to a stopped state.
SPEED LOOP GAIN
This is one item in the parameters of the servo
amplifier, and expresses the speed of the
control response during speed control. When
the load inertia moment ratio increases, the
control system speed response decreases and
the operation may become unstable. If this
happens, the operation can be improved by
raising this setting value.
The overshoot will become larger if the speed
loop gain is raised too far, and motor vibration
noise will occur during operation and when
stopped.
SPEED LOOP MODE
This is one servo control mode used in
positioning. It is a mode for carrying out speed
control. Refer to "POSITION LOOP MODE".
SPEED-POSITION SWITCHING CONTROL
With this control, positioning is carried out to
the end point of the movement amount while
changing the speed at the speed switching
point during positioning control.
SPEED-POSITION SWITCHING CONTROL
MODE
This is one method used for positioning. It is
an application for operations such as high-
speed movement to a point unrelated to
positioning, then set dimension movement
from the switching signal activation point.
Start
Switching signal
High speed
Incremental positioning
Содержание Melsec-Q QD75D1
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Страница 693: ...Appendix 7 MELSEC Q APPENDICES Axis address mm inch degree pulse Axis address mm inch degree pulse ...
Страница 699: ...Appendix 13 MELSEC Q APPENDICES Initial value Axis 1 Axis 2 Axis 3 Axis 4 Remarks 0 0 0 1 1 0 0 0 0 0 0 300 11 0 0 ...
Страница 836: ...Appendix 150 MELSEC Q APPENDICES Appendix 14 External dimension drawing 1 QD75P1N Unit mm 23 4 27 4 98 90 46 ...
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