5DATA USED FOR POSITIONING CONTROL

Pr.19 Speed switching mode

MELSEC-Q

Set whether to switch the speed switching mode with the standard switching or front-loading switching mode.

0

: Standard switching

Switch the speed when executing the next

 

 

positioning data.

1

: Front-loading switching

The speed switches at the end of the positioning

 

 

data currently being executed.

Speed Switch the speed when

 

executing the next positioning data

 

 

t

n: Positioning

 

 

data No.

n

n+1

 

 

<For standard switching>

Speed The next positioning data starts positioning at the designated speed

 

t

n

n+1

<For front-loading switching>

Pr.20

Interpolation speed designation method

When carrying out linear interpolation/circular interpolation, set whether to designate the composite speed or reference axis speed.

0:Composite speed .................. The movement speed for the control target is designated, and the speed for each axis is calculated by the QD75.

1:Reference axis speed ........... The axis speed set for the reference axis is designated, and the speed for the other axis carrying out interpolation is calculated by the QD75.

X axis

X axis

 

Designate composite speed

 

Designate speed

 

for reference axis

Y axis

Y axis

Calculated by QD75

Calculated by QD75

 

<When composite speed is designated>

<When reference axis speed is designated>

Note: Always specify the reference axis speed if the 4-axis linear interpolation or 2 to 4 axis speed control has to be performed.

If you specify the composite speed for a positioning operation that involves the 4-axis linear interpolation or 2 to 4 axis speed control, the error code 523 "interpolation mode error" will be output when the positioning operation is attempted.

For a positioning operation that involves the circular interpolation, specify the composite speed always.

5 - 33

Page 121
Image 121
Mitsubishi Electronics QD75D, QD75P user manual Pr.19 Speed switching mode, Pr.20 Interpolation speed designation method