7 AUXILIARY AND APPLIED FUNCTIONS
7.6 Acceleration/Deceleration Time Change Function
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7
7.6
Acceleration/Deceleration Time Change Function
This function arbitrarily changes the acceleration/deceleration time at speed change, when changing speed with Motion
dedicated functions (CHGV, CHGVS) of Motion SFC program (and also the Motion dedicated PLC instruction M(P).CHGV/
D(P).CHGV, M(P).CHGVS/D(P).CHGVS).
Normally (speed change without changing the acceleration/deceleration time), the acceleration/deceleration time is controlled
by the positioning data of the servo program or the parameter block at the start. However, if a speed change is executed after
setting the acceleration/deceleration time change parameter, speed changes at the set acceleration/deceleration time.
"Acceleration/deceleration time after change" is the acceleration/deceleration time of positioning control being
executed. "Acceleration/deceleration time after change" is valid until the switching of the next positioning
point. (Automatic decelerating processing at positioning completion is also controlled by "Acceleration/
deceleration time after change".)
Speed change instructions for acceleration/deceleration time change
The speed change instructions for acceleration/deceleration time change are shown below.
Control details
After setting the acceleration/deceleration time change parameter, if speed change command is executed, the acceleration/
deceleration time changes. The acceleration/deceleration time change parameter is set for every axis in [Motion Control
Parameter]
[Axis Setting Parameter]
"Expansion Parameter" of MT Developer2. Refer to the Expansion Parameter for
details of acceleration/deceleration time change parameter. (
Page 192 Expansion Parameters)
Refer to the following for details of command generation axis parameter.
MELSEC iQ-R Motion Controller Programming Manual (Advanced Synchronous Control)
• Set the change value of acceleration/deceleration time in the device set by acceleration time change value device/
deceleration time change value device.
• Device set by the acceleration/deceleration time change enable device turns ON (valid).
Classification
Instruction
Description
Motion SFC program
(Motion dedicated function)
CHGV
Speed change request
CHGVS
Command generation axis speed change request
Motion dedicated PLC instruction
M(P).CHGV/D(P).CHGV
Speed change request of the specified axis
M(P).CHGVS/D(P).CHGVS
Speed change request of the specified command generation axis
Name
Setting range
New acceleration time value device
1 to 8388608 [ms]
Other than above: Time change invalid
New deceleration time value device
Summary of Contents for MELSEC iQ-R16MTCPU
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