Siemens Sitrans LR250 Instruction Manual page 80

2.4.3. Fail-safe Value FB1
Note:
can be defined.
User-defined default for the Output Value, if sensor or sensor electronic fault is
detected. Units are the same as the AIFB1 units.
Values
2.4.4. Fail-safe Mode FB2
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. One of three options can be
selected for the material level to be reported when the LOE timer expires.
Options
2.4.5. Fail-safe Value FB2
Note:
can be defined.
User-defined default for the Output Value, if sensor or sensor electronic fault is
detected. Units are the same as the AIFB2 units.
Values
Page 74 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL
Fail-safe Mode must be set to Substitute Value before Fail-safe Value
Range: -999999 to 999999
Default: 0
Material level to be reported
Substitute value (Default value used as output value).
* Last value (Store last valid output value).
Use bad value (Calculated output value is incorrect).
Fail-safe Mode must be set to Substitute Value before Fail-safe Value
Range: -999999 to 999999
Default: 0
7ML19985JF02