User's Manual

Page 80 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS 7ML19985LT01
mmmmm
Parameters
2.5.8. Display
2.5.8.1. Filter Time Constant
The time constant for the damping filter. The damping filter smooths out the
response to a sudden change in level. This is an exponential filter and the
engineering unit is always in seconds (see Damping on page 121
for more
detail).
2.5.8.2. Unit
Engineering unit to be displayed with the output value
2.5.8.3. Out Unit Text
If the desired unit is not listed in Unit (2.5.8.2.) you can define it in Out Unit
Text.
2.5.8.4. Decimal Point
The number of digits to display after the decimal point. (The LCD is limited
to displaying two decimal places in Measurement mode. In SIMATIC PDM
up to seven decimal places may be used to display measured values.)
2.5.9. Fail-safe Mode
2.5.9.1. Mode
Fail-safe Mode occurs if the status of the input value is bad, or if the device
has been put into Fail-safe mode using Simulation. Mode defines the
material level to be reported when the LOE (Loss of Echo) timer expires.
Values
Range 0 to 1500 s
Default: 10 s
Note: Additional units are available in SIMATIC PDM.
Options
a)
a)
In PDM, 3 additional units are available: Not Used, Unknown, and Special
(as permitted by PROFIBUS). In PDM the out unit text is displayed in the
drop-down menu. On the display, the option is ’Follow out unit text’.
m, cm, mm, ft, in, %
*m
Options
Range: 0, 1, 2, 3, 4, 5, 6, 7
Default: 2
Options
SUB VALUE
Substitute value. Value (2.5.9.2.) used as
output value.
* LAST VALUE Last value. (Store last valid output value).
USE BAD VALUE
Use bad value. (Calculated output value is
incorrect).