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Chapter
4
Operating instructions
Flexi Classic
76
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8011509/YPP0/2015-10-26
Subject to change without notice
Special applications and
functions
4.11 Retriggering of the delayed OSSDs
The behaviour of the off delay (not on UE410-xxxT0) can be influenced by means of retrig-
gering. Retriggering is specified by connecting Terminal S3 to the voltage U
B
or the
module-specific cycle output X2.
Retriggering is not possible on the UE410-GU.
Example: Retriggering ON
During automatic operation a protective door is opened and the off delay is started for the
corresponding releases. If the door is closed again before the delay time has expired, the
releases do not switch off and the machine continues to run without interruption.
Example: Retriggering OFF
During manual operation the emergency stop pushbutton is activated and the off delay is
started for the corresponding releases. If the emergency stop pushbutton is reset again
before the delay time has expired and the reset button is pressed, the releases are never-
theless de-activated. Renewed releasing via the reset button is not possible until the delay
time has expired.
Retriggering
Course
ON
If the safe input state (all input conditions are valid) of the input circuits is
attained again before the time has expired, the delayed output circuits do
not change and the delay time is reset
OFF
The delayed output circuits open after the delay time has expired irres-
pective of the state of the input circuits.
In the case of an automatic start and a safe input state before the delay
time has expired, the delayed OSSDs are de-activated for 400 ms, and
are then re-activated
Note
Tab. 35: Retriggering time
response
Fig. 29: Retriggering ON,
with/without restart interlock
Fig. 30: Retriggering OFF,
with restart interlock
Fig. 31: Retriggering OFF,
without restart interlock
Fig. 32: Retriggering OFF,
without restart interlock
Inputs
Output Q
X
Can be set up to x seconds
Inputs
Output Q
X
Can be set up to x seconds
Inputs
Can be set up to x seconds
Output Q
X
Start button
Inputs
Output Q
X
Can be set up to x seconds
400 ms