Mitsubishi Electric MELSEC-L LD75D, Руководство пользователя

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CHAPTER 12 CONTROL SUB FUNCTIONS
12
12.
5
F
unct
ions
t
o C
hange t
he C
ont
rol
Det
ails
12.5.3
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 during speed change, enable/disable
selection) 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]).
The details shown below explain about the "acceleration/deceleration time change function".
• Control details
• Control precautions
• Setting method
(1) 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
during speed change, enable/disable selection")
The following drawing shows the operation during an acceleration/deceleration time change.
[For an acceleration/deceleration time change disable setting]
[For an acceleration/deceleration time change enable setting]
t
V
Cd.12
Cd.15
Operation with the acceleration/deceleration
time set in Da. 3 and Da. 4 .
Disabled
Acceleration/deceleration
time change during speed
change, enable/
disable selection
Speed change
request
t
V
Cd.12
Cd.15
Operation with the acceleration/deceleration
time ( Cd. 10 and Cd. 11 ) set in the buffer
memory.
Disabled
Acceleration/deceleration
time change during speed
change, enable/
disable selection
Speed change
request
Enabled