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MELSEC-Q
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(c) Continuous positioning control using multiple positioning data can be
executed in accordance with the operation patterns the user assigned to
the positioning data. (Refer to Section 5.3 and 9.1.2.)
Continuous positioning control can be executed over multiple blocks, where
each block consists of multiple positioning data. (Refer to Section 10.3.2.)
(d) OPR control is given additional features (Refer to Section 8.2.)
Four different machine OPR methods are provided: the near point dog
method, two count methods, and the data set method.
(e) Two acceleration/deceleration control methods are provided: automatic
trapezoidal acceleration/deceleration and S-pattern acceleration/
deceleration. (Refer to Section 12.7.7.)
(3) Quick startup (Refer to Section 3.1.)
A positioning operation starts up quickly taking as little as 3.5 ms to 4 ms.
When operation using simultaneous start function or interpolation operation is
executed, the axes start without delay.
(Example) Axis 1 and Axis 3 are started by the : No delay in Axis 1 and
simultaneous start function Axis 3 start
Axis 2 and Axis 4 are started by the : No delay in Axis 2 and
interpolation operation Axis 4 start
(4) SSCNET
makes the connection to the servo amplifier possible
(a) The QD75MH can be directly connected to the servo amplifier using the
MELSERVO (Mitsubishi's servo amplifier: MR-J3-B).
(b) Because the SSCNET
cable is used to connect the QD75MH and the
servo amplifier, or servo amplifiers, saving wiring can be realized. The
cable between the QD75MH and servo amplifier or servo amplifiers can be
extended up to 50m (164.04ft.).
(c) By the use of SSCNET
cable (Optical communication), influence of
electromagnetic noise and others from servo amplifier, etc. are reduced.
(d) The servo parameters can be set on the QD75MH side to write or read
them to/from the servo amplifier using the SSCNET
.
(e) The actual current value and error description contained in the servo can
be checked by the buffer memory of the QD75MH.
(5) Easy application to the absolute position system
(a) The absolute position-corresponding servo amplifier is connected to have
an application to the absolute position system.
(b) Once the OP have been established, the OPR operation can also be made
unnecessary when the power is supplied.
(c) With the absolute position system, the data set method OPR is used to
establish the OP.
(d) When the setting unit is "degree", the absolute position system with
unlimited length feed can be configured.