Table of Contents
Advertisement
3.
SPECIFICATIONS
MELSEC-A
The actual parameter speed limit values and JOG speed limit values in Table
3.5 are multiplied by 6.1 (PLS/sec).
For example, the value that is nearest to 200 (PLS/sec) is multiplied by 6.1
(PLS/sec), even
if
the speed limit value is set to 200 (PLS/sec).
200
+
6.1
=
32.78688 .....( Decimal point values are rounded off.)
The actual speed is 6.1 x 32
=
195.2 (PLS/sec).
POINTS
I
(1) Numbers 2 to 12 show the setting range when setting with a
sequence program.
However, parameters whose unit is x10-l or x l O 1 are processed
automatically as x10-l or xlO1 in the A1 SD71 when processed with
a value set in the program.
(Example) If the speed limit value is set to 200, the value becomes
2000x10'
=
20000 mm/min in the AlSD71.
(2) Number 10 -travel per manual pulse during inching is not used with
the A1 SD71.
However, when setting it by using a peripheral device or AD71TU,
the value must be set within the setting range.
I
(3) Numbers 17 and
18 must be set with a PC CPU program.
Parameter data is explained as follows.
(1)
Unit
Selects the units (mm, inch, degree, or pulse) for positioning control. Can
be set independently for X and Y axes (e.g. X axis
=
mm, Y axis =degree).
(2) Travel
per pulse
of the system.
A1 SD71.
Specifies the travel distance per pulse as determined by the mechanics
Controls the number
of pulses contained in the pulse train from the
(3) Speed limit value
Specifies the maximum speed for positioning (or zero return).
When the positioning speed called at a given time is greater than the
speed limit value, the speed is limited to the value set by the parameter.
When a new speed is called during positioning by the sequence pro-
gram and this is greater than the speed limit value, the speed is limited
to the value set by the parameter.
(4)
Jog speed limit value
Specifies the maximum speed for jog operation.
The jog speed limit value must be within the range shown in Table 3.5
and must not exceed the speed limit value.
When the jog speed
set using the peripheral device
or sequence
program is greater than the jog speed limit value, the jog speed is kept
to the limit value.
For jog operation, refer to Section 6.3.6.
3 - 1 2
Advertisement
Table of Contents
