Справочник Пользователя для Mitsubishi Electronics QD75MH2

 
 

 

12 - 10 

MELSEC-Q

 

12   CONTROL SUB FUNCTIONS 

 

(2)  OP shift operation at the "

Pr.47

Creep speed" 

(When "

Pr.56

Speed designation during OP shift" is 1) 

 

When the " Pr. 53 OP
shift amount" is negative

When the " Pr. 53 OP
shift amount" is positive

Pr. 44 OPR
direction 

Zero point

Machine OPR start

Near-point dog

Zero signal 

OP

Pr. 47 Creep
speed

 

Fig. 12.7 OP shift operation at the creep speed 

 

[4]   Precautions during control 

The following data are set after the OP shift amount is complete.  
  

•

  OPR complete flag (

Md.31

Status: b4) 

  

•

 

Md.20

 Current feed value 

  

•

 

Md.21

 Machine feed value 

  

•

 

Md.26

 Axis operation status 

  

•

 

Md.34

 Movement amount after near-point dog ON ("

Pr.53

OP shift 

amount" is not added.) 

 

•

  OPR request flag (

Md.31

Status: b3) is reset after completion of the OP 

shift. 

 

[5]   Setting the OP shift function 

To use the "OP shift function", set the required details in the parameters shown in 
the following table, and write them to the QD75MH.  
When the parameters are set, the OP shift function will be added to the machine 
OPR control. 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.53    OP shift amount 

 

Set the shift amount during the OP shift. 

0 

 Pr.56   

Speed 
designation 
during OP shift 

 

Select the speed during the OP shift 
   0: 

Pr.46

OPR speed 

   1: 

Pr.47

Creep speed 

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.