Positioning Control; Features Of Qd77Gf - Mitsubishi Electric MELSEC-Q Series User Manual

1.1 Positioning control

1.1.1 Features of QD77GF

The QD77GF has the following features.
(1) Wide variety of positioning control functions
The main functions (such as HPR control, positioning control and manual control)
which are required for any positioning system and the sub functions which limit
and add functions to those controls are supported.
(a) Enhanced HPR control
1) Additional features of HPR control
Six machine HPR methods are provided: one proximity dog method,
two count methods, one data set method, one scale origin signal
detection method and one driver HPR method. Select an applicable
method according to the system.
2) HPR retry function
The HPR retry function is provided so that the machine HPR control
can be performed from any position, regardless of the machine stop
position when the system is powered on.
(b) Wide variety of control methods
Positioning controls, such as position control, speed control, speed-position
switching control, position-speed switching control, and other controls, are
provided.
1) Independent control of each axis
Controls, such as position control and speed control, can be performed
independently for each axis at any given timing.
2) Interpolation control
Interpolation controls using multiple axes can be performed.
(2- to 4-axis linear interpolation control, 2-axis circular interpolation
control, 2- to 4-axis speed control, etc.)
3) Speed-torque control
Speed control and torque control not including position loop can be
performed.
(c) Large amount of data
Up to 600 positioning data (combinations of data, such as control method,
positioning address, and command speed) per axis can be set.
(d) Continuous processing of multiple positioning data
Multiple positioning data can be processed continuously within one
positioning operation.
Continuous positioning control can be executed over multiple blocks, where
each block consists of multiple positioning data.
This reduces the number of executions of positioning, management of
execution status, and others.
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Chapter 1 Product Outline