Laser Tab; Figure 10.9: Laser Tab - Leuze electronic BCL 8 Series Manual

10.7

Laser tab

Figure 10.9: Laser tab

Start position and
stop position
Mode
• Normal – mode (1) with optional laser beam narrowing
This is the standard mode without the reflector polling function
• Reflector polling with auto activation reading gate – mode (2)
In this mode, the decoding of the label is automatically started after the scanning
beam to the reflector has been interrupted. Following successful decoding or
renewed detection of the reflector, the reading gate is automatically closed. If the
reflector is covered, the reading gate is automatically opened for decoding.
• Reflector polling without auto activation reading gate,
send an 'AR' command – mode (3)
In this mode, the decoding does not start automatically. Starting must be activated via
a control or via a switching input. This mode is of interest if a programmable logic con-
troller (PLC) wants to know whether or not the scanning beam to the reflector is cur-
rently interrupted. If this is the case, the PLC can start the decoding by sending the +
command. The BCL sends an 'AR=1' command (freely configurable) if a reflector was
detected or it sends an 'AR=0' command (freely configurable) if no reflector is
present.
• Reflector polling without auto activation reading gate, set the switch – mode (4)
Same as mode (3), except that the detection of whether or not a reflector is present is
passed on via the switching output. As in mode 3, decoding is not activated automati-
cally; this is the task of the control.
• Reflector polling without auto activation reading gate,
send an 'AR' command and set the switch – mode (5)
Combination of mode (3) and mode (4). In this mode, the BCL sends a message to
the control and simultaneously activates the switching output.
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Here, you can narrow down the reading field width of the laser beam.
BCL 8
Important parameters
51