Baumer N 143 - Manual (Page 17)

N 143
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Significance of parameter „a“
Positioning direction
This parameter defines the direction the target is headed for. For precise positioning, any tolerances at cog-
wheels, joints, shafts etc require backlash compensation which is performed by moving towards the target in so-
called loops. A loop operation means first crossing the target position by a defined traveling distance for a sec-
ond travel towards the target in the opposite direction. The parameter for the crossing distance is defined in
command “b”. Whether a loop operation is necessary will be indicated by the arrows in the display. A flashing ar-
row means backlash compensation required. When reaching the turning point the direction will change and the
arrow stops flashing. Targets which permit direct positioning operations are marked by a non-flashing arrow.
Once the target is attained within the stipulated tolerance window (see command “b”), the arrows will not disap-
pear until the imperative backlash compensation has been performed.
00 = Up Direct positioning if target position > actual position; otherwise perform backlash compensation
01 = Down Direct positioning if target position < actual position; otherwise perform backlash 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 indicate the operator the direction to choose (clockwise or
counter-clockwise, up/down) in the positioning operation. Following parameters are available:
00 = Up If actual value < target = arrow to the right; actual value > target = arrow to the left
01 = Down As „Up“, but inverted arrows direction
10 = Uni
If actual value ≠ target arrows ever indicated
11 = Off Arrows ever hidden
Note: A loop operation (as backlash compensation) is only performed with settings Up and Down. Uni and Off al-
ways implicate a direct travel towards the target without backlash compensation.
Rounding the actual value
The actual value that is inside the tolerance window but still different from the target will be rounded to the target
value as soon as the shaft remains idle for approx. 3 seconds. The rounding operation is only visual, the true in-
ternal current value remains unchanged. For current value readout by serial interface (command “R”) the true, un-
rounded actual position value will be provided. The true current value will immediately reappear on the display
upon pressing a button. If the position is still within the tolerances, the rounding operation will be repeated after 3
seconds.
Note: In operating mode „Hide target = Ever“ the target is deactivated and the SPA will serve as pure current
value display. The rounding function is disabled. The following parameters are available:
0 = Off Rounding of current value disabled
1 = On Rounding of current value enabled
Turn display
This parameter permits turning the display in a 180° angle.
0 = Off Display readout with standard mounting, i.e. display above keypad
1 = On Display readout with inverted mounting, i.e. display below keypad
Offset
Command „U“ sets the offset which is added to both current value and current target. This parameter defines
whether the offset is enabled or disabled in the calculation.
0 = Off Offset disabled. Any offset previously transmitted is NOT added neither to actual value nor target.
1 = On Offset enabled. Offset is added to current value and actual target.
Hide target
This parameter defines when to indicate the target in the upper line of the display.
0 = On Indicate target if target ≠ current value.
1 = Off Ever indicate target, also if target = current value. Indicate arrows too if target ≠ current value.
2 = Ever Ever hide target and arrows.