10 HIGH-LEVEL POSITIONING CONTROL

10.6Start program for high-level positioning control 10.6.1 Starting high-level positioning control

MELSEC-Q

To execute high-level positioning control, a sequence program must be created to start the control in the same method as for major positioning control.

The following shows the procedure for starting the "1st point block start data" (regarded as block No. 7000) set in axis 1.

QD75

 

Buffer memory

Drive unit

 

4)

1)

Control by designated

positioning data

 

7000

1500

 

2)

 

PLC CPU

1

1501

3)

 

 

ON

Input/output signal

Y10

When carrying out a positioning start with the next scan after a positioning operation is completed, input signal X10 as an interlock so that the start is carried out once the X10 signal turns OFF after the Y10 signal turns OFF.

1)Set "7000" in " Cd. 3 Positioning start No.".

(This establishes that the control as "high-level positioning control" using block start data.)

2)Set the point No. of the "block start data" to be started. (In this case "1".)

3)Turn ON the start signal.

4)The positioning data set in the "1st point block start data" is started.

Fig. 10.2 High-level positioning control start procedure

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Mitsubishi Electronics QD75D, QD75P user manual QD75 Buffer memory Drive unit, 7000 1500, 1501, Input/output signal Y10