Справочник Пользователя для Mitsubishi Electronics QD75MH2

 
 

 

9 - 16 

MELSEC-Q

 

9   MAJOR POSITIONING CONTROL 

 

9.1.4 Confirming the current value 

 Values showing the current value 

 

The following two types of addresses are used as values to show the position in 
the QD75MH. 
These addresses ("current feed value" and "machine feed value") are stored in the 
monitor data area, and used in monitoring the current value display, etc. 

 

Current feed value 

•

 This is the value stored in "

Md.20

 Current feed value". 

•

 This value has an address established with a "machine OPR" as a 

reference, but the address can be changed by changing the current 
value to a new value.  

•

 This value is updated every 1.7ms. 

Machine feed value 

•

 This is the value stored in "

Md.21

 Machine feed value". 

•

 This value always has an address established with a "machine OPR" 

as a reference. The address cannot be changed, even if the current 
value is changed to a new value.  

•

 This value is updated every 56.8ms. 

 

The "current feed value" and "machine feed value" are used in monitoring the 
current value display, etc. 

 

0

1  to

Md. 20 Current feed value

t

V

OP

20000

Current value changed to 
20000 with current value
changing instruction 

0

1 to

Md. 21 Machine feed value

Address after the current
value is changed is stored

10000

10000

Address does not change even
after the current value is changed
                                                       

 

Fig. 9.8 Current feed value and machine feed value