Mitsubishi Electronics QD75MH2 ユーザーズマニュアル

 
 

 

12 - 24 

MELSEC-Q

 

12   CONTROL SUB FUNCTIONS 

 

[2]   Precautions during control 

If any axis exceeds "

Pr.8

 Speed limit value" during 2- to 4-axis speed control, 

the axis in excess of the speed limit value is controlled at the speed limit value. 
The speeds of the other axes interpolated are suppressed depending on their 
command speed ratios. 
If the reference axis exceeds "

Pr.8

 Speed limit value" during 2- to 4-axis linear 

interpolation control, 2- to 4-axis fixed-feed control or 2-axis circular interpolation 
control, the reference axis is controlled at the speed limit value (The speed limit 
does not function on the interpolation axis side.) 

 

[3]   Setting the speed limit function 

To use the "speed limit function", set the "speed limit value" in the parameters 
shown in the following table, and write them to the QD75MH.  
The set details are validated after they are written to the QD75MH. 

 

Setting item 

Setting 

value 

Setting details 

Factory-set 
initial value 

 Pr.8   Speed limit value 

 

Set the speed limit value (max. speed during control). 

200000 

 Pr.31  

JOG speed limit 
value 

 

Set the speed limit value during JOG operation (max. 
speed during control). (Note that 

Pr.31

 JOG speed 

limit value shall be less than or equal to 

Pr.8

 Speed 

limit value.) 

20000 

 

                   Refer to Section 5.2 "List of parameters" for setting details. 

 

REMARK 

•

 Parameters are set for each axis.  

•

 It is recommended that the parameters be set whenever possible with GX 

Configurator-QP. Execution by PLC program uses many PLC programs and 
devices. The execution becomes complicated, and the scan times will increase.