Mitsubishi Electronics QD75D, QD75P 12.7.5 Target position change function, [1] Details of control

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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.7.5 Target position change function
The "target position change function" is a func tion to change a target position to a
newly designated target position at any timing during the positio n control (1-axis linear
control). A command speed can also be chang ed simultaneously.
The target position and command speed changed ar e set directly in the buffer
memory, and the target position change is exec uted by " Cd.29 Target p osition
change request flag".
The following shows the details of the "target position chang e fu nc ti on" .
[1] Details of control
[2] Precaution during operation
[3] Method of setting target position change functi on from PLC CPU
[1] Details of control
The following charts show the details of con trol of the target position change
function.
(a) When the address after change is position ed away from the start point more than the posit ioning address:
Target position change request Positioning address Address after change
(b) When the speed is changed simultaneousl y with changing the address:
Target position change request Positiioning address Address after change
Speed before
change
Speed after
change
(c) When the direction of the operation is changed:
T
arget position change
request
Positioning address
Address after
change
Fig. 12.41 Target position change operation