Baumer N 153 - Manual (Page 15)

N 153
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Significance of parameter „a“
Positioning direction
This parameter defines the direction the target is aimed for. Tolerances that occur for example at cogwheels,
joints, shafts etc during a precise positioning operation requires a tolerance compensation. The tolerance com-
pensation is proceeded by aiming for the target position always from the same direction utilizing so-called loops.
Loops mean that the target position is first crossed by a defined distance and then aimed for again from the op-
posite direction. The parameter for the crossing distance is programmed by command “b”. Whether a loop is re-
quired or not is indicated by the arrows in the display. A flashing arrow means tolerance compensation required.
Upon reaching the turning point the direction changes and the arrow stops flashing. Targets allowing direct posi-
tioning are marked by a non-flashing arrow. Upon achieving the target within the programmed tolerances (see
command “b”) the arrows will not disappear until the required tolerance compensation has been completed.
00 = Up 00 = Up
01 = Down 01 = Down
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 the right or to the
left, up/down) of the new 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
always implicate a direct movement to the target without backlash compensation.
Rounding the actual value
This means that the actual 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 actual value remains unchanged. For actual value readout by serial interface (command
“R”) the true, not rounded actual position value is provided. The true actual 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 „Suppress target = Ever“ the target is deactivated and the SPA serves as pure actual
value display with disabled rounding function. The following parameters are available:
0 = Off Round actual value disable
1 = On Round actual value enable
Turn display
This parameter is utilized to turn 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
Dimension
Only in conjunction with N 242 master. By this parameter the master enables indication of actual value and di-
rect positioning (so-called dimension). Refer also to N 242 user manual.
Utilized with other controls (PLC or PC) this parameter may be assigned to general identifications.
0 = Off Device not indicated in N 242 master
1 = On Device indicated in N 242 master. Direct target input possible