Mitsubishi Electronics QD75MH1 Manuel D’Utilisation

 
 

 

12 - 12 

MELSEC-Q

 

12   CONTROL SUB FUNCTIONS 

 

[2]   Precautions during control 

(1)  The feed command of the backlash compensation amount are not added to 

the "

Md.20

Current feed value" or "

Md.21

Machine feed value".  

 

(2)  Always carry out a machine OPR before starting the control when using the 

backlash compensation function (when "

Pr.11

Backlash compensation 

amount" is set). The backlash in the mechanical system cannot be correctly 
compensated if a machine OPR is not carried out.  

 

(3)  Backlash compensation, which includes the movement amount and 

"

Pr.11

 Backlash compensation amount", is output the moment at the 

moving direction changes. 

 

[3]   Setting the backlash compensation function 

To use the "backlash compensation function", set the "backlash compensation 
amount" in the parameter shown in the following table, and write it to the 
QD75MH.  
The set details are validated at the rising edge (OFF   ON) of the PLC READY 
signal (Y0). 

  

Setting item 

Setting 

value 

Setting details 

Factory-set 
initial value 

 Pr.11   

Backlash 
compensation 
amount 

 

Set the backlash compensation amount. 

0 

 

                   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.