Technical Reference; Fail-Safe Mode - Siemens SITRANS L Operating Instructions Manual

Technical reference

Note
Where a number follows the parameter name [for example, Master Reset (4.1.)] this is the
parameter access number via the handheld programmer. See Parameter Reference (Page 90)
for a complete list of parameters.
C.1

Fail-safe Mode

The purpose of the Fail-safe setting is to put the process into a safe mode of operation in the
event of a fault or failure. The value to be reported in the event of a fault is selected so that a
loss of power or loss of signal triggers the same response as an unsafe level.
Fail-safe mode may be triggered by a loss of echo, a bad configuration, or certain device
faults. You can select one of three possible values to be reported when a Fail-safe mode is
activated.
Mode (2.6.9.1.)
Mode determines the material level to be reported when LOE Timer (2.3.6.) expires.
Mode (2.6.9.1.)
SUB VALUE
LAST VALUE
USE BAD VALUE
Value (2.6.9.2.)
Value defines the material level to be reported if the option Use substitute value is selected in
Mode (2.6.9.1.).
The two Analog Input Function blocks are set separately.
To set a user-defined value:
• Navigate to Level Meter > Setup > Analog Input (1 or 2)
• Set Mode (2.6.9.1.) to Use substitute value.
• Go to Value (2.6.9.2.) and enter the desired value.
176
Use substitute value. Value (2.6.9.2.) used as output value.
* Last value (Store last valid output value).
Use bad value (Calculated output value is incorrect).
Operating Instructions, 07/2021, A5E32337680-AF
C
SITRANS LR200 with PROFIBUS PA