Mitsubishi Electronics QD75P, QD75D List of functions 1 QD75 control functions, Main functions

3 SPECIFICATIONS AND FUNCTIONS

MELSEC-Q

3.2 List of functions

3.2.1 QD75 control functions

The QD75 has several functions. In this manual, the QD75 functions are categorized and explained as follows.

Main functions

(1)OPR control

"OPR control" is a function that established the start point for carrying out positioning control, and carries out positioning toward that start point. This is used to return a workpiece, located at a position other than the OP when the power is turned ON or after positioning stop, to the OP. The "OPR control" is preregistered in the QD75 as the "Positioning start data No. 9001 (Machine OPR)", and "Positioning start data No. 9002 (Fast OPR). (Refer to Chapter 8 "OPR Control".)

(2)Major positioning control

This control is carried out using the "Positioning data" stored in the QD75. Positioning control, such as position control and speed control, is executed by setting the required items in this "positioning data" and starting that positioning data. An "operation pattern" can be set in this "positioning data", and with this whether to carry out control with continuous positioning data (ex.: positioning data No. 1, No. 2, No. 3, ...) can be set. (Refer to Chapter 9 "Major Positioning Control".)

(3)High-level positioning control

This control executes the "positioning data" stored in the QD75 using the "block start data". The following types of applied positioning control can be carried out.

•Random blocks, handling several continuing positioning data items as "blocks", can be executed in the designated order.

•"Condition judgment" can be added to position control and speed control.

•The operation of the designated positioning data No. that is set for multiple axes can be started simultaneously. (Pulses are output simultaneously to multiple servos.)

•The designated positioning data can be executed repeatedly, etc., (Refer to Chapter 10 "High-level Positioning Control".)

(4)Manual control

By inputting a signal into the QD75 from an external source, the QD75 will output a random pulse train and carry out control. Use this manual control to move the workpiece to a random position (JOG operation), and to finely adjust the positioning (inching operation, manual pulse generator operation), etc. (Refer to Chapter 11 "Manual Control".)

Sub functions

When executing the main functions, control compensation, limits and functions can be added. (Refer to Chapter 12 "Control Sub Functions".)

Common functions

Common control using the QD75 for "parameter initialization" or "backup of execution data" can be carried out. (Refer to Chapter 13 "Common Functions".)

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