Acceleration/Deceleration Time Change Function - Mitsubishi Electric RD77MS2 User Manual

Acceleration/deceleration time change function

The "acceleration/deceleration time change function" is used to change the acceleration/deceleration time during a speed
change to a random value when carrying out the speed change by the "speed change function" and "override function".
In a normal speed change (when the acceleration/deceleration time is not changed), the acceleration/deceleration time
previously set in the parameters ([Pr.9], [Pr.10], and [Pr.25] to [Pr.30] values) is set in the positioning parameter data items
[Da.3] and [Da.4], and control is carried out with that acceleration/deceleration time. However, by setting the new acceleration/
deceleration time ([Cd.10], [Cd.11]) in the control data, and issuing an acceleration/deceleration time change enable
command ([Cd.12] Acceleration/deceleration time change value during speed change, enable/disable) to change the speed
when the acceleration/deceleration time change is enabled, the speed will be changed with the new acceleration/deceleration
time ([Cd.10], [Cd.11]).
Control details
After setting the following two items, carry out the speed change to change the acceleration/deceleration time during the
speed change.
• Set change value of the acceleration/deceleration time ("[Cd.10] New acceleration time value", "[Cd.11] New deceleration
time value")
• Setting acceleration/deceleration time change to enable ("[Cd.12] Acceleration/deceleration time change value during
speed change, enable/disable")
The following drawing shows the operation during an acceleration/deceleration time change.
[For an acceleration/deceleration time change disable setting]
[Cd.12] Acceleration/deceleration time
change value during speed
change, enable/disable
[For an acceleration/deceleration time change enable setting]
[Cd.12] Acceleration/deceleration time
change value during speed
change, enable/disable
8 CONTROL SUB FUNCTIONS
256
8.5 Functions to Change the Control Details
V
Operation with the acceleration/deceleration
time set in [Da.3] and [Da.4].
[Cd.15]
Speed change
request
Disabled
V
Operation with the acceleration/deceleration time
([Cd.10] and [Cd.11]) set in the buffer memory.
[Cd.15]
Speed change
request
Disabled Enabled
t
t