Siemens 7ML5431 - Page 121

Parameter reference
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
121
Options
Reference point
Description
*
Level
Low Calibration Point
measured as a percentage of the differ-
ence between High Calibration Point and
Low Calibration Point
Space
High Calibration Point
Distance
Sensor reference point measured as a percentage of Low Cali-
bration Point
Volume
converts a level measurement to a volume output
Manual
a)
(LUI only)
allows
mA
Output Value (2.6.6.)
to be set to a user-defined value
a)
Current Output Function must be set to
Manual
before modifying
mA Output Value (2.6.6.).
Re-
member to restore the previous Current Output Function setting after modifying mA Output Value.
To view the mA reading in the secondary region of the LCD, press on the handheld
programmer.
To modify Current Output Function via SIMATIC PDM:
● Open the menu Device – Select Analog Output. See Select Analog Output via SIMATIC
PDM (Page 84) for more detail.
4 mA Setpoint (2.6.2.)
Sets the process level corresponding to the 4 mA value. 4 mA always defaults to 0, and
Current Output Function (2.6.1.) determines whether this is a Level, Space, Distance, or
Volume measurement. (See
Current Output Function (2.6.1.) for an illustration.)
Values
Range: –999999 to +999999 (limits vary with current function and units)
Default:
0.00
m (set to value corresponding to 0% as defined by Current
Output Function)
Related Parameters
Units (2.2.1.)
Current Output Function (2.6.1.)
● Enter the reading that is to correspond to a 4 mA output.
●
Units are defined in Units (2.2.1.) for Level, Space, or Distance. Units are unspecified for
Volume.
20 mA Setpoint (2.6.3.)
Sets the process level corresponding to the 20 mA value. 20 mA always defaults to 100%,
and
Current Output Function (2.6.1.) determines whether this is a Level, Space, or Distance
measurement. (See
Current Output Function (2.6.1.) for an illustration.)
Values
Range: –999999 to +999999 (limits vary with current function and units)
Default:
20.00
m (set to value corresponding to 100% as defined by Current
Output Function)
Related Parameters
Units (2.2.1.)
Current Output Function (2.6.1.)
● Enter the reading that is to correspond to a 20 mA output.
●
Units are defined in Units (2.2.1.) for Level, Space, or Distance. Units are unspecified for
Volume.