
B–63010EN/02
4. DESCRIPTION OF PARAMETERS
91
Speed
Parameter 1
(No.1770)
Parameter 2 (No.1771)
Time
NOTE
When 0 is set in parameter No.1770 or parameter No.1771,
linear acceleration/deceleration before interpolation is
disabled.
1771 Parameter 2 (for look–ahead control) for setting an acceleration for linear ac-
celeration/deceleration before interpolation (time used to reach the maximum
machining speed during linear acceleration/deceleration before interpolation)
[Data type] Word
[Unit of data] 1 msec
[Valid range] 0 to 4000
This parameter is used to set an acceleration for linear acceleration/
deceleration before interpolation in the look–ahead control mode. In this
parameter, set the time (time constant) used toreach the speed set in
parameter No.1770.
NOTE
1 When 0 is set in parameter No.1770 or parameter No.1771,
linear acceleration/deceleration before interpolation is
disabled.
2 In parameter Nos. 1770 and 1771, set values that satisfy the
following:
Parameter No.1770/Parameter No.1771 y 5
1772
Time constant for bell–shaped acceleration/deceleration of acceleration time
fixed type before look–ahead interpolation
[Data type] Byte
[Unit of data] ms
[Valid data range] 0 to 100
This parameter is used to set a time constant when the BEL parameter (bit
7 of parameter No.1603) is set to 1, that is, when bell–shaped
acceleration/deceleration before look–ahead interpolation is selected in
AI contour control mode. Set the value of tb as shown below. When 0 is
set, linear acceleration/deceleration before interpolation is applied.