Mitsubishi Electric MELSEC iQ-R Series User Manual page 318

[When executing acceleration change in the acceleration section 2 or during fixed-speed, deceleration, and automatic
deceleration]
When acceleration change is executed in the acceleration section 2, the acceleration change is accepted, however
acceleration operation during execution does not change. When re-acceleration is performed by velocity change etc, the axis
accelerates with the acceleration after change.
Velocity
Target velocity
after change (V')
Target velocity(V)
Acceleration
Target acceleration (A')
Target acceleration
before change (A)
Deceleration change
When "0: mcAccDec" is selected in the "acceleration/deceleration method setting" (Options bit 0 to 2) of the FB, deceleration
change can be performed.
The following terms are used in deceleration change.
Term
Current deceleration
Target deceleration
before change
Target deceleration after
change
When deceleration change is performed during operation, the target position may be overrun by decreasing the deceleration.
In this case, the axis is controlled based on AxisName(AxesGroupName).Pr.OverrunOperation.
[When executing deceleration change in the acceleration section or fixed-speed section]
The deceleration change is accepted, however the operation during execution does not change. When deceleration is
performed, the axis decelerates with the deceleration after change.
[When executing deceleration change in deceleration other than the automatic deceleration]
The basic operation is the same as the acceleration change and the acceleration/deceleration time change. Refer to the
following.
Page 314 Acceleration change and acceleration/deceleration time change
[When executing deceleration change in the automatic deceleration]
The deceleration change is accepted, however the operation during execution does not change. When re-deceleration is
performed after the axis re-accelerates by target velocity change, the axis decelerates with the deceleration after change.
9 RELEVANT FUNCTIONS TO VELOCITY
316
9.1 Acceleration/deceleration Processing Function
Acceleration change
Velocity change
Abbreviation Description
DecNow The deceleration when changing the deceleration
Dec Target deceleration before deceleration is changed
Dec' Target deceleration after deceleration was changed
Acceleration operation is not changed
even if the acceleration change is executed.
Acceleration time (AT)
Time
It becomes the target acceleration after change
when carrying out acceleration again for a
velocity change, etc.
Time