Mitsubishi Electronics QD75MH4 사용자 설명서

 
 

 

9 - 99 

MELSEC-Q

 

9   MAJOR POSITIONING CONTROL 

 

9.2.18 Position-speed switching control 

In "position-speed switching control" ("

Da.2

Control system" = Forward run: 

position/speed, Reverse run: position/speed), before the position-speed switching 
signal is input, position control is carried out for the movement amount set in 
"

Da.6

Positioning address/movement amount" in the axis direction in which the 

positioning data has been set.  When the position-speed switching signal is input, the 
position control is carried out by continuously outputting the pulses for the speed set in 
"

Da.8

command speed" until the input of a stop command. 

The two types of position-speed switching control are "Forward run: position/speed" in 
which the control starts in the forward run direction, and "Reverse run: position/speed" 
in which control starts in the reverse run direction. 

 

 Switching over from position control to speed control 

 

(1)  The control is switched over from position control to speed control by the 

external signal "position-speed switching signal". 

(2)  Besides setting the positioning data, the "

Cd.26

Position-speed switching 

enable flag" must also be turned ON to switch over from position control to 
speed control. (If the "

Cd.26

Position-speed switching enable flag" turns ON 

after the position-speed switching signal turns ON, the control will continue as 
position control without switching over to speed control. Only speed control will 
be carried out when the "

Cd.26

Position-speed switching enable flag" and 

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