Mitsubishi GX Configurator-PT, User Manual

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MELSEC-Q
1 PRODUCT OUTLINE
CHAPTER 1 PRODUCT OUTLINE
This user's manual provides the specifications, handling, programming methods and
other information of the QD70 positioning module used with the MELSEC-Q series
CPU module.
1.1 Positioning control
1.1.1 Features of QD70
The following are the features of the QD70.
(1) Wide assortment of 4-axes and 8-axes modules
The QD70 is a positioning module used in a multi-axes system that does not
need complex control.
It is not compatible with the MELSEC-A series AD70 positioning module in I/O
signals, functions, etc.
(2) About positioning control functions
(a) The QD70 has a number of functions required for a positioning control
system, such as positioning control to any position and equal-speed control.
1) You can set up to 10 pieces of positioning data, which include
positioning address, control method, operation pattern and like, per axis.
These positioning data are used to exercise positioning control axis-by-
axis.
2) Axis-by-axis positioning control allows linear control (up to 8 axes can be
controlled simultaneously).
This control can perform positioning termination with one piece of
positioning data or exercise continuous positioning control by continuous
execution of multiple pieces of positioning data.
(b) As the control method, any of position control, speed-position switching
control and current value changing may be specified in each positioning
data.
(c) The following six different OPR methods are available for "machine OPR
control": near-point dog method (one method), stopper (three methods) and
count (two methods).
(d) Varying finely in speed to ensure smooth acceleration/deceleration, the
QD70 is suitable for connection to a stepping motor.
(e) You can change the I/O signal logic according to the specifications of the
external device.
This allows the input signals to be used with either of "normally open" and
"normally closed" contacts, and the output signals to be used according to
the specifications of the drive unit.
(3) Fast start processing
Processing at a position control start has been speeded up to shorten the start
processing time of one axis to 0.1ms.
At a simultaneous start of multiple axes (the positioning start signals are turned
ON at the same time within one scan), there are no starting delays between the
axes.
(4) Ease of maintenance
In the QD70, error definitions have been subdivided to improve maintenance
performance.
(5) Ease of utility package settings
The optionally available utility package (GX Configurator-PT) allows initial setting
and auto refresh setting to be made on the screen, reducing sequence programs
and facilitating the confirmation of the setting status and operating status.
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