Справочник Пользователя для Mitsubishi Electronics QD75MH4

 
 

 

12 - 42 

MELSEC-Q

 

12   CONTROL SUB FUNCTIONS 

 

12.5 Functions to change the control details 

Functions to change the control details include the "speed change function", "override 
function", "acceleration/deceleration time change function" and "torque change 
function". Each function is executed by parameter setting or PLC program creation and 
writing.  

 

Both the "speed change function" or "override function" change the speed, but the 
differences between the functions are shown below. Use the function that corresponds 
to the application.  

 

"Speed change function" 

•

 The speed is changed at any time, only in the control being executed. 

•

 The new speed is directly set.  

 

POINT 

 

The speed change function is available even during JOG operation. 

 
 

"Override function" 

•

 The speed is changed for all control to be executed. (Note that this excludes 

manual pulse generator operation.) 

•

 The new speed is set as a percent (%) of the command speed.  

 

POINT 

 

The override function is available even during JOG operation. 

 
 

12.5.1 Speed change function 

The speed control function is used to change the speed during control to a newly 
designated speed at any time.  
The new speed is directly set in the buffer memory, and the speed is changed by a 
speed change command (

Cd.15

Speed change request) or external command signal.  

During the machine OPR, a speed change to the creep speed cannot be carried out 
after deceleration start because the near point dog ON is detected. 

 

The details shown below explain about the "speed change function".  
  [1] Control details 
  [2] Precautions during control 
  [3] Setting the speed change function from the PLC CPU 
  [4] Setting the speed change function using an external command signal