Mitsubishi Electronics QD75D PTP Control Point To Point Control, Forward Reverse, Type Terminal

APPENDICES

POSITIONING CONTINUED PULSE

MELSEC-Q

Refer to the section of term "operation pattern".

POSITIONING DATA

This is data for the user to carry out positioning. The No. of points to which positioning is carried out (the No. of addresses) is designated by the user. In the QD75, these are 600 points.

As a principle, positioning is executed in the order of the data Nos.

POSITIONING PARAMETER

This is basic data for carrying out positioning control. Types of data include control unit, movement amount per pulse, speed limit value, upper and lower stroke limit values, acceleration/deceleration time, positioning system, etc.

Parameters have an initial value, so that value is changed to match the control conditions.

The turning ON and OFF of the current (voltage) for short periods. A pulse train is a series of pulses. The QD75 is the module that generates the pulses.

PULSE GENERATOR

This is a device that generates pulses. Examples include devices installed on the motor shaft that create pulses when the shaft rotates, and digital devices.

1-phase types output one pulse train. 2-phase types output two pulse trains with a phase difference. From 600 to 1,000,000 pulses can be output per shaft rotation. Generators with a ZERO signal function to output 1 or 2 pulses per shaft rotation. Abbreviated as PLG.

Refer to the term "ENCODER".

POSITIONING START

This refers the act of designating a target data No. and starting the positioning.

The operation after the positioning is complete for that data No. is determined by the data No.'s positioning pattern.

PTP Control (Point To Point Control)

This is a type of positioning control. With this control method, the points to be passed are designated at random locations on the path.

Movement only to a given target positioning is requested. Path control is not required during movement from a given point to the next value.

PULSE OUTPUT MODE

There are two methods used to issue forward run and reverse run commands to the servomotor. The type used differs according to the machine maker. In type A, the forward run pulses and reverse run pulses are output from separate terminals.

In type B, the forward run pulses and reverse run pulses are output from the same terminal, and a forward/reverse run identification signal is output from another terminal.

Forward
Reverse	Forward
		Reverse
A type	B type

Terminal

Appendix - 85