Fail-Safe - Siemens sitrans LR200 Instruction Manual

2.4. Fail-safe

2.4.1. LOE Timer
Note:
the timer expires, the reading is set based on Fail-safe Value (see below).
Sets the time to elapse in minutes since the last valid reading, before Fail-safe
State activates
Values
2.4.2. Fail-safe Mode FB1
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
2.4.3. Fail-safe Value FB1
Accessible in SIMATIC PDM only after Substitute value is selected in Fail-safe
Mode FB1 (2.4.2.).
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
7ML19985JR01 SITRANS LR200 (PROFIBUS PA) – INSTRUCTION MANUAL
The last valid reading is maintained until the LOE timer expires. After
Range: 0 to 720 min.
Default: 10.0
Material level to be reported
SUB VALUE
* LAST VALUE
USE BAD VALUE Calculated output value is incorrect.
Range: -999999 to 999999
Default: 0
Material level to be reported
SUB VALUE
* LAST VALUE
USE BAD VALUE Calculated output value is incorrect.
Default value used as output value.
Store last valid output value.
Default value used as output value.
Store last valid output value.
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