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12   CONTROL SUB FUNCTIONS 

 

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 indicated in Section 12.5.1 "Speed change 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".  
  [1] Control details 
  [2] Precautions during control 
  [3] Setting the acceleration/deceleration time change function 

 

[1]   Control details 

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 during
           speed change, enable/
           disable selection

Cd.15 Speed
change request

t

V

Operation with the acceleration/deceleration
time set in Da. 3 and Da. 4 . 

Disabled

 

[For an acceleration/deceleration time change enable setting] 

Cd.12 Acceleration/deceleration
           time change during
           speed change, enable/
           disable selection

Cd.15 Speed
change request

Disabled

Enabled

t

V

Operation with the acceleration/deceleration

time ( Cd. 10  and  Cd. 11 ) set in the buffer memory.

 

Fig. 12.31 Operation during an acceleration/deceleration time change