Operating Instructions
Chapter 8
ICR845-2
Troubleshooting
8012377/0000/2008-01-30
©
SICK AG · Division Auto Ident · Germany · All rights reserved
105
8
Troubleshooting
8.1
Overview of errors and malfunctions which could occur
8.1.1
Installation errors
ICR845-2 positioned incorrectly in reading distance
The code is not completely in the field of view
Reading pulse sensor positioned incorrectly (e.g. internal reading interval starts too late
or stops too soon)
8.1.2
Electrical connection errors
Interfaces on the ICR845-2 connected incorrectly (wiring error in the CDB620 or
CDM420)
8.1.3
Parameterization errors
Functions not adapted to local conditions, e.g. communication parameters of the
host interface set incorrectly
Technical limits of device not taken into consideration, e.g. resolution-specific depth of
field
8.1.4
Malfunctions during operation
Timeout for illumination field elapsed
Device error (hardware/software)
8.2
Monitoring errors and malfunctions
The ICR845-2 is self-monitoring:
After the power supply has been switched on, the ICR845-2 automatically carries out a
self-test, in which it checks important hardware components, before it is initialized (pa-
rameter set loaded and device functions initialized). The self-test can be repeated at
any time by cancelling Reading mode.
For calling up, see
Chapter 6.9.7 Self-test, Page 86
.
If the ICR845-2 detects an error during the self-test or at any other time, it outputs the
error status ST = 3 via the host interface.
Prerequisite: the error status is enabled for transmission.
By default, transfer is blocked.
The ICR845-2 displays the diagnosed errors in encoded form as a number combination
in the fourth field from the left on the bottom on the status line of the CLV-Setup user
interface via the auxiliary interface (
Table 8-1, Page 106
).
During operation, the ICR845-2 constantly monitors the operation of its illumination
LEDs. In addition, a watchdog circuit responds to error statuses.
A timer automatically deactivates the illumination LEDs in Reading mode ("Sensor in-
put" and "Serial interface" trigger mode) if the reading interval has not ended after 10
minutes (default setting). However, it does not end the reading interval.
In this case, the ICR845-2 outputs the following message to the auxiliary interface:
"
Illumination safety timeout
".
The reading pulse must be terminated by resetting the pulse signal. The next reading
pulse switches on the LEDs and, thus, the illumination field again.