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Revision 8.6
SECTION 3 : TRAVEL PARAMETERS
48
Note
Any other combination will cause a J. error
fault, which indicates that either speed steps
have
been
selected
without
a
defined
directional signal or in the event of this
parameter being set as YES two directional
inputs have been selected simultaneously
3.4.21.
Plug Reduced %SP
NO
PARAMETER
DESCRIPTION
SCALE
INCREMENT
DEFAULT
21
Plug Reduced
%SP
0% to 20%
5%
15%
During the latest phase of Neutral Plugging, the torque applied may be at such high level that by the
time the motor reaches zero speed the remaining counter torque may cause the motor to accidentally
move into the opposite direction for a short period while the brakes are busy being applied (Kick back
effect). This is more evident when the required Neutral deceleration profile is made very short (i.e. quick
deceleration).
To avoid the “kick back effect” we can reduce the Neutral plugging ceiling to
approximately 85% of its preselected value, when the motor speed drops below a certain point. The
speed at which the “Reduced Counter torque” is applied is determined by this parameter.
3.4.22.
Notches 1, 2 and 3 Smooth Profile
NO
PARAMETER
DESCRIPTION
SCALE
INCREMENT
DEFAULT
22
N123 smooth Prfl
N123 smoothness Profile
10 to 300
10
160
This parameter is only necessary to set away from its Default value, when the Travel motion presents
signs of speed instability during steady slow speed operation. By setting it high the Closed loop
response to speed changes in a way that tends to respond quicker and harsher to speed variations due
to torque fluctuations caused by the travelling rails getting into contact with the travelling wheels, this
may result in further speed oscillations, therefore to reduce such oscillations, it may be necessary to
reduce the value of this parameter. This will result in a less responsive close loop response to speed
variations, and therefore eliminating speed oscillations. Reducing it too low, may result in a very sluggish
speed response, which may not be desirable as far as operation is concerned.
