9 MAJOR POSITIONING CONTROL

9.2.16 Speed-position switching control (INC mode)

MELSEC-Q

In "speed-position switching control (INC mode)" ("

Da.2

Control system" = Forward

run: speed/position, Reverse run: speed/position), the pulses of the speed set in

" Da.8 Command speed" are kept output on the axial direction set to the positioning

data. When the "speed-position switching signal" is input, position control of the movement amount set in " Da.6 Positioning address/movement amount" is exercised.

"Speed-position switching control (INC mode)" is available in two different types: "forward run: speed/position" which starts the axis in the forward run direction and "reverse run: speed/position" which starts the axis in the reverse run direction.

Use the detailed parameter 1 " Pr.150 Speed-position function selection" with regard to the choice for "speed-position switching control (INC mode)".

Setting item

Setting

Setting details

Buffer memory address

value

Axis 1

Axis 2

Axis 3

Axis 4

 

 

 

 

Speed-

 

 

 

 

 

 

Pr.150

position

0

Speed-position switching control

34

184

334

484

function

(INC mode)

 

 

 

 

 

 

 

selection

 

 

 

 

 

 

If the set value is other than 0 and 2, it is regarded as 0 and operation is performed in the INC mode.

For details of the setting, refer to Section 5.2 "List of parameters".

Switching over from speed control to position control

(1)The control is switched over from speed control to position control by the external signal "speed-position switching signal".

(2) Besides setting the positioning data, the "

Cd.24

Speed-position switching

enable flag" must also be turned ON to switch over from speed control to

position control. (If the "

Cd.24

Speed-position switching enable flag" turns

ON after the speed-position switching signal turns ON, the control will continue as speed control without switching over to position control. Only position

control will be carried out when the "

Cd.24

Speed-position switching enable

flag" and speed-position switching signal are ON at the operation start.)

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Mitsubishi Electronics QD75P, QD75D user manual Speed-position switching control INC mode