Operating Instructions
Chapter 3
ICR845-2
Product description
8012377/0000/2008-01-30
©
SICK AG · Division Auto Ident · Germany · All rights reserved
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ically adjusts the flash frequency and duration. With a maximum of two working areas, a
maximum of just two separate strips in the image field can be evaluated. To read the codes
successfully when the active field of view is reduced, the objects must be routed exactly and
the codes must be fixed in the same location.
On request, the ICR845-2 outputs the image buffer memory content as binary or grey scale
bitmap via the Ethernet interface. The images can be displayed by the Image FTP program.
3.4.2
Decoding
As codes are detected in the image data, the ICR845-2’s decoding algorithms determine
the code(s) contents. At the end of the reading cycle the ICR845-2 outputs the code data
information via its host interface to a host/PC for further processing.
The ICR845-2 is equipped with four decoders:
The decoder for omni-directional reading of 2D codes
The tried-and-tested standard decoder of the CLV series for 1D codes (bar codes)
The SMART decoder (SICK Modular Advanced Recognition Technology) for decoding
1D codes on following conditions:
– small aspect ratio (ratio of the code height to the code length)
– dirty or damaged printed code
– bar codes that are tilted excessively (azimuth angle)
The 360°-decoder for omni-directional reading of 1D codes
The ICR845-2 derives useful diagnosis data from the reading process and transfers it to the
host. It also records operating data that can be requested at any time. The reading quality
of 2D codes can be checked in the "Percentage Evaluation" operating mode.
3.4.3
Reading triggering and indicating of result status
To start the reading process when an object is located in the field of view, the ICR845-2 re-
quires a suitable trigger. This opens a time window ("reading interval") in the ICR845-2 for
the reading procedure. In the default setting, this trigger is supplied by an external reading
pulse sensor. Alternative trigger sources include Free Running mode or a command sent via
the host interface.
The current operating status is indicated by four LEDs. A beeper indicates the status of the
reading result. In the default setting, the "Good Read" function is selected for this.
If the trigger is supplied externally by a sensor, the "Sensor 1" switching input signals the
start of the reading procedure to the ICR845-2. The "Sensor 2" switching input is used to
signal alternatively the end of reading procedure or to enter a path increment. It can also be
used e.g. to teach in a match code.
The "Result 1" and "Result 2" switching outputs can be assigned various functions and trig-
ger external devices, such as a PLC. Using the "Result 1" output, an external illumination can
additionally be triggered or directly powered (max. 100 mA) by the ICR845-2.
The ICR845-2 is configured via the serial auxiliary interface/host interface with the CLV-Set-
up configuration software or with command strings. Alternatively, the Ethernet interface is
available for both types of operation.
The ICR845-2 outputs system and error messages as error codes, which can be requested
from the error memory using command strings.
