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Commissioning and configuration
204
BCL 548
i
Leuze electronic
Flow diagrams
Successful reading:
Unsuccessful reading:
PLC Photoelectric
sensor
BCL 548
i
Description
Time
Photoelectric sensor from 0
1
The photoelectric sensor is interrupted.
The signal of the switching output of
the photoelectric sensor is present at
the switching input of the BCL 548
i
and
activates the scanner.
M 1023 bit 0.1 from 0
1
M 1023 bit 0.2 = 0
M 1023 byte 1 = data length
M 1023 byte 2 to 12 = result
The bar codes that have been read are
processed and transmitted by module
1023:
Reading concluded bit 0.1 = 1 and bar
code not decoded bit 0.2 = 0.
The data length is entered in byte 1, in
this case 11 decimal.
The decoding result is transmitted in
the following 11 bytes.
Internal processing
Internal data processing.
Photoelectric sensor from 1
0
The beam of the photoelectric sensor is
cleared and sets the switching input of
the BCL 548
i
to 0. This deactivates the
scanner.
PLC Photoelectric
sensor
BCL 548
i
Description
Time
Photoelectric sensor from 0
1
The photoelectric sensor is interrupted.
The signal of the switching output of
the photoelectric sensor is present at
the switching input of the BCL 548
i
and
activates the scanner.
Photoelectric sensor from 1
0
The beam of the photoelectric sensor is
cleared before a read result is present.
The photoelectric sensor sets the switch-
ing input of the BCL 548
i
to 0 and deac-
tivates the scanner.
M 1023 bit 0.1 from 0
1
M 1023 bit 0.2 from 0
1
M 1023 byte 1 = 1
M 1023 byte 2 = result
The module decoding state signals:
Reading concluded bit 0.1 = 1 and bar
code
not
decoded bit 0.2 = 1.
The data length is entered in byte 1.
The result hex 3F ("?" = no read) is
transmitted.
Internal processing
Internal data processing