Baumer N 142 - Manual (Page 17)

N 142
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Significance of parameter „a“
Positioning direction
This parameter defines in which direction the target is headed for. Compensating tolerances, for example at
cogwheels, joints, shafts etc during a precise positioning operation requires a tolerance compensation. The
tolerance compensation is proceeded by heading for the target position always from the same direction by so-
called loops. Loops mean that the target position is first crossed by a defined distance and then headed for again
from the opposite direction. The parameter for the crossing distance is programmed by command “b”. Whether a
loop is required or not can be seen from the direction arrows on the display. A flashing arrow means a tolerance
compensation is required. Upon reaching the turning point the direction changes and the arrow stops flashing. A
target enabling direct positioning is marked by a non-flashing arrow. Upon reaching the target within the
programmed tolerances (see command “b”) the arrows will not disappear until the required tolerance
compensation was completed.
00 = Up Direct positioning if target position > current position; otherwise proceed tolerance compensation
01 = Down Direct positioning if target position < current position; otherwise proceed tolerance compensation
Counting mode
This parameter assigns either „ascending“ or „descending” counted values in relation to the shaft’s direction of
rotation. Following parameters are available:
00 = Up Clockwise rotation, ascending counted values
01 = Down Clockwise rotation, descending counted values
Arrows
This parameter relates to the arrows in the display that show the operator the direction (to the right or to the left)
of the new positioning operation. Following parameters are available:
00 = Up If current value < target = arrow to the right; current value > target = arrow to the left
01 = Down As „Up“, but inverted direction of the arrows
10 = Uni If current value ≠ target indicate both arrows
11 = Off Arrows ever hidden
Note: A loop operation (for backlash compensation) is only performed with settings Up and Down. Uni and Off
always implicate a direct movement to the target without backlash compensation.
Rounding the current value
This means that the current value being within the tolerances but still differing from the target is rounded up or
down to the target value as soon as the shaft remains idle for approx. 3 seconds. The rounding operation is only
visual, the true internal current value remains unchanged. For current value readout by serial interface (command
“R”) the true, not rounded current position value is provided. The true current value will immediately reappear on
the display upon actuating a key. If the position is still within the tolerance window the rounding operation will be
repeated after 3 seconds.
Note: In operating mode „Hide target = Ever“ the target is deactivated and the SPA serves as a pure current
value display with disabled rounding function. The following parameters are available:
0 = Off Rounding the current value disabled
1 = On Rounding the current value enabled
Turn display
This parameter turns the display by 180°.
0 = Off Display readout with standard mounting, i.e. display above keypad
1 = On Display readout with inverted mounting, i.e. display below keypad