Error Displays Of The Led - SICK TR4 Instrucciones De Operación

Operating Instructions
TR4
Tab. 4: Error displays of
the Status/Diag LED
8014465/2012-05-07
Subject to change without notice
Fault diagnosis
8.3

Error displays of the LED

This section explains the meaning of the error displays of the
Status/Diag LED and how to respond to the messages. Please refer to
section 3.3 "LED indicators" on page 141 for a description.
Please refer to section 6.2.3 "Error displays of the TR4 Unique Coded
during teach-in" on page 155 for a description of the error messages
during teach-in mode.
Display Possible cause
Green Power-up test
or
Signal on the OSSD
inputs In A and In B
invalid or not
present
Red Actuator outside
the response range
Red (1 Hz) Recoverable error
Red (4 Hz) Unrecoverable
error
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
Rectification of the error
Wait until the device has
completed the power-up
test.
Check the voltage supply
(24 V DC) and the OSSD
inputs In A and In B (red
and yellow wires).
In case of cascaded safety
switches, check whether all
actuators are in the
response range of the
related sensors.
Move the actuator into the
response range.
Check the OSSDs for short-
circuit to 0 V, 24 V DC or to
each other.
Disconnect the voltage
supply to the device for at
least 3 seconds to reset the
device.
Replace the device.
GB
Chapter 8
161