User's Manual

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Basic knowledge
4
4.3 Read distance/
offset
4.4 Product
description
4.5 Data security
4.6 IO-Link basic
knowledge
To ensure that data carriers are recognized without error and the data can be reliably read, do
not exceed a maximum distance and maximum offset between the data carriers and read heads
(
see “Technical Data” starting page 16).
The “distance” specification refers to the maximum distance from the data carrier to the sensing
surface of the read head.
The “offset” specification indicates the maximum offset between the center axis of the data
carrier and the center axis of the sensing surface.
Data carriers can only be reliably recognized and the data reliably read within the permissible
read distance and offset. In the border area an unstable condition may occur, so that a data
carrier is alternately recognized and lost.
Data carrier recognition is indicated by an LED on the device (“TP – Tag Present”,
see “Technical
Data” starting page 16
). At the same time the CP bit is set in the input buffer (“CP – Codetag
Present”,
see “Process Data” starting page 42).
Processor BIS L-409-045-…-07-S4:
Plastic housing,
circular connector terminations,
one read head connected,
the read head suitable for dynamic or static operation,
data carrier is powered by the read head using a carrier signal.
In order to ensure data integrity, data transmission between the data carrier and processor can
be monitored using a check procedure.
In the processor a CRC_16 data check can be configured.
If the CRC check is enabled, the data carrier data are checked using a 2-byte CRC_16 check-
sum. If the checksum does not agree with the checked data, an error message is sent.
Note
The CRC_16 data check can only be used with data carriers of type BIS L-10X-05/L
The data carriers must be initialized using a BIS L-60_ _ processor and the
BISCOMRW.EXE PC software or a portable reader BIS L-81_ (refer to the User's
guide for the corresponding device for this procedure).
The manufacturer-specific standard IO-Link sends not only the actual process signal, but also all
relevant parameter and diagnostics data on the process level over a single standard cable.
Communication is based on a standard UART protocol with 24V pulse modulation; no separate
power supply is required. Connection is possible using a 2-conductor or 3-conductor cable.
Advantages of IO-Link:
Uniform, simple wiring of different devices
Controlling system can be used to change the device parameters
Remote querying of diagnostics information is possible
Centralized data retention of the device parameters is possible
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BIS L-409 IO-Link Device
Processor