Mitsubishi Electronics QD75D, QD75P user manual Target position change function, Details of control

12CONTROL SUB FUNCTIONS

12.7.5 Target position change function

MELSEC-Q

The "target position change function" is a function to change a target position to a newly designated target position at any timing during the position control (1-axis linear control). A command speed can also be changed simultaneously.

The target position and command speed changed are set directly in the buffer memory, and the target position change is executed by " Cd.29 Target position

change request flag".

The following shows the details of the "target position change function".

[1]Details of control

[2]Precaution during operation

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

[1] Details of control

The following charts show the details of control of the target position change function.

(a) When the address after change is positioned away from the start point more than the positioning address:

Target position change request Positioning address Address after change

(b) When the speed is changed simultaneously with changing the address:

Speed after change

Speed before change

Target position change request

Positiioning address Address after change

(c) When the direction of the operation is changed:

Address after change

Positioning address

Target position change request

Fig. 12.41 Target position change operation

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