Mitsubishi Electronics QD75D, QD75P user manual Set 1 Carry out speed change

12 CONTROL SUB FUNCTIONS

MELSEC-Q

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

The following table and chart show the example of a data setting and sequence program used to change the target position of the axis 1 by the command from the PLC CPU, respectively. (example in which the target position value and command speed are changed to a new target position of "300.0 m" and a new command speed of "10000.00 mm/min".)

(1) The following data is set.

(Referring to the starting time chart shown in item (2) below, carry out the setting with the sequence program shown in item (3).)

		Setting		Buffer memory address
	Setting item		Setting details
				Axis	Axis	Axis	Axis
		value
				1	2	3	4
	Target position			1534	1634	1734	1834
Cd.27	value	3000	Set the new address.	1535	1635	1735	1835
	(new address)
	Target position			1536	1636	1736	1836
Cd.28	value (new speed)	1000000	Set the new speed.	1537	1637	1737	1837
	Target position		Set "1: Carry out speed change".
Cd.29		1		1538	1638	1738	1838
	change request flag

Refer to Section 5.7 "List of control data" for details on the setting details.

(2) The following shows the time chart for target position change.

V

Dwell time

t

Positioning start signal [Y10]

PLC READY signal [Y0]

QD75 READY signal [X0]

Start complete signal [X10]

BUSY signal [XC]

Positioning complete signal [X14]

Error detection signal [X8]

Cd.	Target position value (new address)			3000
Cd.	Target position value (new speed)			1000000
Cd.	Target position change request flag	0	1	0

Fig. 12.42 Time chart for target position change from PLC CPU

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