7 AUXILIARY AND APPLIED FUNCTIONS
7.6 Acceleration/Deceleration Time Change Function
447
7
Cautions
• In the following cases acceleration time or deceleration time does not change when a speed change is executed. The
acceleration time or deceleration time at the time of speed change accept is maintained.
• During interpolation control, change of acceleration/deceleration time is executed by the acceleration/deceleration time
change parameter of the axis No. specified with the speed change command.
• Acceleration/deceleration time change function becomes invalid for axes executing the following servo instructions:
• Acceleration/deceleration time change function becomes invalid for axes executing the following acceleration/deceleration
methods:
• If a negative speed change request is executed acceleration/deceleration time change function is only valid for axes
executing speed control (
), or speed control (
). If a negative speed change request is executed for axes executing other
instructions, acceleration/deceleration time change function becomes invalid. Also, if an acceleration/deceleration time
change is performed for axes operating at a negative speed, acceleration/deceleration time change function becomes
invalid.
• When setting of the acceleration/deceleration time change enable device was omitted.
• When setting of new acceleration time value device or new deceleration time value device was omitted.
• When the device set by new acceleration time value device or new deceleration time value device is set to "0".
• Circular interpolation control (including point during CPSTART)
• Helical interpolation control (including point during CPSTART)
• Speed control with fixed position stop
• FIN acceleration/deceleration
• Advanced S-curve acceleration/deceleration control
Decelerate at
deceleration time
after change
0
t
V
500
OFF
ON
Acceleration/deceleration
time change enable device
New acceleration time
value device
New deceleration time
value device
Speed change request
(CHGV)
OFF
ON
Change of acceleration
time is not executed
0
Acceleration/deceleration time change is not executed at negative speed
change request. (Except speed control(
³
) and speed control(
´
).)
0
t
V
-100000
-200000
1000
2000
200000
1000
2000
OFF
ON
OFF
ON
Acceleration/deceleration
time change enable device
New acceleration time
value device
New deceleration time
value device
Speed change request
(CHGV)
Change speed
100000
[pulse/s]
200000
-200000
-100000
Acceleration/deceleration time
change is not executed for during
operation at negative speed.
Acceleration/deceleration
time change is executed
Summary of Contents for MELSEC iQ-R16MTCPU
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