Mitsubishi Melsec-A Series User Manual page 42

3. SPECIFKATIONS
/MELSEC
(d) M code
Specifies an "M" code relevant to that position address. (range: 0
to 255)
The code should be set to 0 if it is not required.
During interpolation positioning, M codes are given individually
for the X and Y axes. (X-axis
M
code, buffer address = 46. Y-axis
M code, buffer address =
346.)
(2)
Positioning speed
Specifies the speed a t which the next position is to be approached.
POINT
I
b f o r e operation, the parameter zpeed limit is checked and if
the positioning rpeed e x d s the
speed
limit value, the
parameter
s p e e d limit value is used.
Positioning speed for linear interpolation
During linear
interpolation positioning, the speed set for the axis
with the furthest to travel takes precedence and
the speed of the
other axis is derived as follows.
(Short travel axis speed)
-
(short travel distance)
-
(long
axis
'peed)
x (long travel distance)
An example of this is given in Fig.
3.20
which
uses
the following
data:
X
Axis
Y
Axis
Parameter set value
:
speed limit value
50KPLS/sec 20KPLS/sec
Positioning data set value : positioning
speed
50KPLS/sec
POKPLS/sec
To move from point A (address 0, 0 ) to point B ( l w k p , 200kp),
X-axis travel is less than Y-axis travel so V y = 50kp/s has precedence.
X-axis positioning speed = 50 x
-
=
200
loo
25KPLS/sec
(This speed exceeds the speed limit value which is ignored in thiscase.)
4