Mitsubishi Electronics QD75D, QD75P user manual Speed-position switching signal setting, Cd.23

9 MAJOR POSITIONING CONTROL

MELSEC-Q

Speed-position switching signal setting

The following table shows the items that must be set to use the external command signals (CHG) as speed-position switching signals.

	Setting item		Setting	Setting details	Buffer memory address
			value		Axis 1	Axis 2	Axis 3	Axis 4
		External		Set the "2: speed-position and
		command
Pr.42			2	position-speed switching	62	212	362	512
		function
				requests".
		selection
		External		Set "1: Validate external
	Cd.8	command	1		1505	1605	1705	1805
				command".
		valid

Refer to Section 5.2 "List of parameters" and Section 5.7 "List of control data" for information on the setting details.

Changing the position control movement amount

In "speed-position switching control (INC mode)", the position control movement amount can be changed during the speed control section.

(1)The position control movement amount can be changed during the speed control section of speed-position switching control (INC mode).

A movement amount change request will be ignored unless issued during the speed control section of the speed-position switching control (INC mode).

(2) The "new movement amount" is stored in "

Cd.23

Speed-position switching

control movement amount change register" by the sequence program during speed control.

When the speed-position switching signal is turned ON, the movement amount for position control is stored in " Cd.23 Speed-position switching control

movement amount change register".

(3)The movement amount is stored in the " Md.29 Speed-position switching

control positioning amount" of the axis monitor area from the point where the control changes to position control by the input of a speed-position switching signal from an external source.

Speed control	Position control
Speed-position switching control (INC mode) start	Position control start

t

Movement amount change possible

			ON
Speed-position switching signal	OFF
				Setting after the speed-position
				switching signal ON is ignored
Cd.23 Speed-position switching control,	0	P2		P3

movement amount change register

P2 becomes the position control movement amount

Speed-position switching latch flag	ON
Md.31 Status : b1
		OFF

Fig. 9.15 Position control movement amount change timing 9 - 87