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MELSEC-Q
1 PRODUCT OUTLINE
1.1 Positioning control
1.1.1 Features of QD75
The features of the QD75 are shown below.
(1) Availability of one, two, and four axis modules
(a) One, two and four axis modules are available for both the open collector
system pulse output (QD75P1, QD75P2, and QD75P4) and differential
driver system pulse output (QD75D1, QD75D2, and QD75D4), comprising
six different models.
A model is determined by the drive unit type and number of axes. (Refer to
Section 2.2.)
(b) For connecting any of the QD75 modules to the base unit, a single slot and
32 dedicated I/O channels are required.
Within the limit imposed by the maximum number of inputs and outputs
supported by the PLC CPU, up to 64 modules can be used. (Refer to
Section 3.1.)
(2) Wide variety of positioning control functions
(a) A wide variety of positioning control functions essential to any positioning
system are supported: positioning to an arbitrary position, fixed-feed
control, equal-speed control, and so on. (Refer to Section 5.3 and 9.2.)
1) Up to 600 positioning data items, including such information as
positioning addresses, control systems, and operation patterns, can be
prepared for each axis.
Using the prepared positioning data, the positioning control is
performed independently for each axis. (In addition, such controls as
interpolation involving two to four axes and simultaneous startup of
multiple axes are possible.)
2) Independent control of each axis can be achieved in linear control
mode (executable simultaneously over four axes).
Such control can either be the independent positioning control using a
single positioning data or the continuous positioning control enabled by
the continuous processing of multiple positioning data.
3) Coordinated control over multiple axes can take the form of either the
linear interpolation through the speed or position control of two to four
axes or the circular interpolation involving two axes.
Such control can either be the independent positioning control using a
single positioning data or the continuous positioning control enabled by
the continuous processing of multiple positioning data.
(b) For each positioning data, the user can specify any of the following control
systems: position control, speed control, speed-position switching control,
position-speed switching control, and so on. (Refer to Section 5.3 and 9.2.)