Troubleshooting In Case Of Cascading; Fig. 13: Troubleshooting With Cascaded Safety Switches - SICK TR4 Instrucciones De Servicio

en
Chapter 8
Note
Fig. 13: Troubleshoo-
ting with cascaded
safety switches
90
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Fault diagnosis
Display Possible cause
Yellow Actuator in the
(1 Hz) boundary area of
the switch-on
distance; safe
status, OSSD Out A
and OSSD Out B
active
8.4

Troubleshooting in case of cascading

If an error occurs on TR4 safety switches used in a cascade, the related
device indicates the error state (Status/Diag LED flashes
switches off its safety outputs. In this case all other downstream TR4
safety switches also switch off their safety outputs and the Status/Diag
LEDs flashes Green.
The safety switches ahead of a device with an error in the cascade can-
not detect the error state. Their Status/Diag LED continue to illuminate
Green if their actuators are in the response range.
Switch 1 Switch 2
Green
Actuator 1 Actuator 2
Rectification of the error
Re-align sensor and
actuator.
Switch 3 Switch 4
Green Red
Actuator 3 Actuator 4
Operating Instructions
Red) and
Switch 5
Green Green
Actuator 5
8014467/YIJ2/2015-03-02
Subject to change without notice
TR4