User's Manual

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10.1 Function
principle
10.2
Operating mode
The BIS L-409-... Identification System is a non-contact read-only system. The compact proces
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sor consists of processing circuitry with a fixed read head.
The system may be used to read information which has been permanently programmed into the
data carrier and to send current status messages to the controller.
The main components of the BIS L-409-... Identification System are:
Processor,
read head,
data carriers.
A
Fig. 32: Schematic representation of an identification system
The data carrier is an autonomous unit which is supplied with power by the read head. The read
head continuously sends a carrier signal which is picked up by the data carrier from within a
certain distance. Once the data carrier is powered, a static read operation takes place.
The processor manages the data transfer between read head and data carrier, serves as a buffer
storage device, and sends the data to the host controller.
The data are passed to the IO-Link Master using IO-Link protocol, and the Master then passes
them to the controlling system.
Host systems may be the following:
A control computer (e.g. industrial PC),
a PLC.
The BIS L-409-... supports cyclical data exchange via IO-Link protocol and standard IO mode.
Recognition of a data carrier (Codetag Present, 24 V) or no data carrier (0 V) is sent on the data
line C/Q as a digital switching signal.
In cyclical data exchange the BIS L-409-... cyclically sends read data to the controller. It is also
possible to read or enter parameter data in this mode.
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Device Function
10
Data carrier BIS L-2…
Connection to
IO-Link Master
BIS L-409 IO-Link Device
Processor