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

 
 

 

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MELSEC-Q

 

12   CONTROL SUB FUNCTIONS 

 

[3]   Method of setting target position change function from PLC CPU 

The following table and chart show the example of a data setting and PLC 
program used to change the target position of the axis 1 by the command from 
the PLC CPU, respectively. (example in which the target position value and 
command speed are changed to a new target position of "300.0 m" and a new 
command speed of "10000.00 mm/min".) 
(1) The following data is set. 

(Referring to the starting time chart shown in item (2) below, carry out the 
setting with the PLC program shown in item (3).) 

 

Buffer memory address 

Setting item 

Setting 

value 

Setting details 

Axis 

1 

Axis 

2 

Axis 

3 

Axis 

4 

 Cd.27  

Target position  
Value (new ad-
dress) 

3000  Set the new address. 

1534 
1535 

1634 
1635 

1734 
1735 

1834 
1835 

 Cd.28  

Target position  
value (new speed) 

1000000  Set the new speed. 

1536 
1537 

1636 
1637 

1736 
1737 

1836 
1837 

 Cd.29  

Target position 
change request 
flag 

1 

Set "1: Carry out speed change". 

1538  1638  1738  1838 

 

                   Refer to Section 5.7 "List of control data" for details on the setting details. 

 

(2) The following shows the time chart for target position change. 

 

PLC READY signal [Y0]

QD75 READY signal [X0]

Start complete signal [X10]

BUSY signal [XC]

Error detection signal [X8]

V

t

Positioning start signal [Y10]

Target position value (new address)

Target position value (new speed)

1000000

3000

Positioning complete signal [X14]

Dwell time

Cd.27

Cd.28

Target position change request flag

1

0

0

Cd.29

All axis servo ON [Y1]

 

 

Fig. 12.42 Time chart for target position change from PLC CPU