Troubleshooting In Case Of Cascading; Fig. 13: Troubleshooting With Cascaded Safety Switches - SICK TR4-SE series Betriebsanleitung

en
Chapter 8
Note
Fig. 13: Troubleshoo-
ting with cascaded
safety switches
90
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
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 ∏ Red) and
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
Ν Green if their actuators are in the response range.
Switch 1 Switch 2
Green
Ν
Actuator 1 Actuator 2
Rectification of the error
= Re-align sensor and
Switch 3 Switch 4
Green Red
Ν ∏
Actuator 3 Actuator 4
Operating Instructions
actuator.
Switch 5
Green Green
∏ ∏
Actuator 5
8014467/YTD7/2016-03-30
Subject to change without notice
TR4