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Delay between teach signal and response on alarm output:
t11
alarm output
external teach input
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Time
Description of timing functions
Value
Comment
t1
Minimum button hold time to enter
teach mode
5 s
Using the button, this feature can
only be used within 5 minutes
after power-up. Using the external
teach input, it may be used at any
time.
t2
Maximum waiting time after
teaching the first position.
< 20 s
If the button has not been pushed
during this interval, the sensor will
leave the teach mode without any
changes.
t3
LED on as response for the first
position.
approx 3 s
t4
Maximum waiting time after
teaching the second position.
< 20 s
If the button has not been pushed
during this interval, the sensor will
leave the teach mode without any
changes.
t5
LED on and “OK response” after
the second position.
approx 3 s
t6
LED Blinking for “NOT OK
response” after teaching the
second position.
approx 5 s
t7
Minimal time between high/low
transition of alarm output high/low
transition of the external teach
input at the beginning of the teach.
1 ms
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t8
Pulse lengths on external teach
input for first position.
30 .. 2000 ms
t9
Pulse lengths on external teach
input for second position.
30 .. 2000 ms
t10
Delays between teach signal and
response on alarm output at the
rising edge of the signal.
< 20 ms
t11
Delay between teach signal and
response on alarm output at the
falling edge of the signal
< 10 ms
t12
Minimum blinking time for the
reset to factory settings with
button.
10 s
t13
Blinking time after reset to factory
settings
> 0.2 s
As long as the button is down or
the external teach input is high.
t14
Minimum blinking time for the
reset to factory settings with
external teach input.
10 s
t15
Minimum high time of the external
teach input after the alarm output
has been set at the end of the
setting of the factory settings.
0.2 s
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7
Alarm output
The alarm output indicates when an object is outside the measuring range or when the received
signal cannot be used for measuring distance. In this case, the output shows 0 V (4 mA).
The sensor has no internal hold function if measured values are missing. It provides real time
measuring.
In some critical applications (poorly reflective objects), the sensor sometimes loses the signal and
the output signal drops down to 0 V (4 mA). For such applications, we recommend to use the alarm
output. Before reading the analog signal, observe the alarm output; if it is active, the analog signal
must be invalid.