Mitsubishi Electronics QD75D After mode, No.1 No.2, No.10 Positioning No.11 Code, Clamp command

APPENDICES

MELSEC-Q

ABSOLUTE ENCODER

This is a detector that enables the angle data within 1 motor rotation to be output to an external destination. Absolute encoders are

generally able to output 360° in 8 to 12 bits. Incremental encoders have a disadvantage in that the axis position is lost when a power failure occurs. However, with absolute encoders, the axis position is not lost even when a power failure occurs.

Various codes such as a binary code and BCD code can be output.

Absolute encoders are more expensive, more accurate, and larger than incremental encoders. Refer to "ENCODER".

Fixed slit
	2	0 Light-emitting diode
Slit disk	2	1
	2	3
	2	4
Phototransistor
	24
	23
Rotating	22
	21
axis	20
		Binary code

ABSOLUTE POSITION DETECTION SYSTEM

In the absolute position detection system, once an OPR is carried out at the system startup, the system stores the machine position in the memory and retains the current position even when the power is turned OFF. Mechanical deviation will be compensated, so that the OPR is not required after the power is turned ON next time. Configuring this system requires a motor with an absolute position detector and a servo amplifier and positioning module compatible with an absolute position detection system.

ABSOLUTE SYSTEM

This is one system for expressing a positioning address.

Absolute address system.

This system uses 0 as a reference, and expresses the address as the distance from 0. The direction is automatically determined, even when it is not designated. The other address system is the increment system.

0 No.1 No.2 No.3

ACCELERATION TIME

The parameter acceleration time refers to the time from a stopped state to the time the speed limit value is reached, so it becomes proportionally shorter as the setting speed decreases. The acceleration time is determined by factors such as machine inertia, motor torque, and load resistance torque.

Speed limit value

Setting speed

Speed 0 Time

Acceleration time

ADDRESS

1)This is a numerical value to express the positioning position, designated in mm, inch, angle, or No. of pulse units.

2)The memory address. Many addresses are stored in the memory. An address is read or written after it is designated.

AFTER mode

This is the mode that outputs the M code after positioning is complete (after stopping). Clamping can be commanded, drilling dimensions can be selected, etc., with this mode.

No.10	Positioning	No.11
		M code (8)
		ON	OFF
		Clamp command

Appendix - 69