Microsonic LCA-2 - Manual (Page 36)

Page 36 of 51 Parameter change in the double sheet control
V OLTAGE LEVEL OF THE LOGIC STATES AT THE CONTROL INPUTS
Logical state Voltage level
pnp npn
0 -UB + UB
1 + UB - UB
M OUNTING DISTANCE
Numeric input of the spacing between transmitter and receiver.
S ENSITIVITY CLASSES
The fact that the dbk+4 control inputs are unconnected or on logic 0 points to pre-selection of the
"Standard" sensitivity class where the range of sheet material weights from a typical 50 g/m
2
up to 800
g/m
2
can be scanned.

The 3 control inputs allow the sensitivity classes to be pre-selected in keeping with the Fig 4 table.

The "Thin" setting is to be selected for extremely thin materials, such as bible printing paper, with
weight per unit areas of under 50 g/m
2
.

The "Thick" setting is available for sheet metals, thick plastic films, paperboard and finest
corrugated card..

Changes between sensitivity classes can be undertaken under on-going operations.

Pre-selecting an over-low sensitivity class can result - even with a single sheet - in a double sheet
signal appearing. In such an instance, the next-higher sensitivity class is to be pre-selected.

Pre-selecting an over-high sensitivity class results - given a single sheet - in the double-sheet
detection indicating overcontrol at the LEDs: one LED lights up green and the other green/red
(orange blend). In such an instance, the next-lower sensitivity class is to be pre-selected.
Parameterization of the D1 switched output onto the "Overcontrol" output function achieved with
LinkControl software results in the overcontrol signal being additionally outputted on D1.