2
0
1
5
-0
5
18
Commissioning
6
Commissioning
6.1
Alignment and Adjustment
Aligning two devices over long distances is difficult and is almost impossible to
achieve if working alone. However, optimal alignment of the devices and the
highest possible reception level are crucial for faultless data transfer. The new
"bidirectional" display mode of the LS682 optical data coupler helps with this
process.
There are two display modes to help you with adjustment:
■
Unidirectional: suitable for short distances up to approx. 150 m
■
Bidirectional: suitable for long distances from 150 m to 300 m
Alignment Aids in "Unidirectional" Display Mode
To make alignment easier, an alignment LED that is visible from far away is
located on the front of the device. As soon as a receiver detects the emitted light
of the device opposite it, the flashing frequency of the alignment LED decreases.
When the alignment LED goes out, the devices are optimally aligned. Sufficient
excess gain is available.
Figure 6.1
Position of the alignm ent LED and the bar graph display on the device
The bar graph indicator shows the reception level of the device on which it is
located.
Tip
The optical data coupler is designed to ensure that an adequate reception level is
obtained over the entire emitter spot. However, for technical reasons, the
maximum reception level is often not in the center of the spot. To ensure that the
range is as symmetrical as possible, Fuchs recommends using the
adjustment aid to "trace" the edges of the spot horizontally and vertically, and then
setting the center position. The drop-off in intensity at the edge of the spot is very
pronounced, which makes the edges easy to locate.
Bar graph display
Alignment LED
