8.2.8
Defining substitute values for "No echo"
If "No echo" is present uninterrupted after expiration of the delay time, substitute values
can be defined for output. These can either be the last valid measured values or
user-defined substitute values.
The digital outputs are set corresponding to the substitute values, when using switching
functions "Distance to object", "Window" or "Object speed".
The output of substitute values can be detected, after corresponding parameterization,
by evaluating a digital output (“Service/No echo” switching variable) or the RS-422
status double word (bit 11). When using the SSI interface with the 24+8 data format,
the status of the digital output named above can be read in via the respective status
bit.
Parameter
Factory setting
HOLD:
Last valid distance/speed measured values
Deactivated
VALUE:
Free choice of values,
see "Configuring user-defined substitute
.
Activated
8.2.9
Configuring user-defined substitute values
User-defined substitute values are used to provide signal evaluation with a value for
calculation and output in the event of “No echo”.
NOTE
The -6096,000 m and 6096,000 m (-20000,000 ft and 20000,000 ft) distance substi‐
tute values have a special meaning. These values generate NAMUR failure information
on the analog output (3.0 mA/21.5 mA).
The distance substitute values can be selected directly in the numeric input editor by
pressing the “1” or “4” buttons for a long time.
Parameter
Factory setting
Distance:
-6096.000 m ... 6096.000 m
0 m
Speed:
-20 m/s to 20 m/s
0 m/s
8
REFERENCE
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O P E R A T I N G I N S T R U C T I O N S | DT1000 PROFIBUS DP and DL1000 PROFIBUS DP
8024560/1A19/2021-06-30 | SICK
Subject to change without notice