Fail-Safe - Siemens Sitrans LR200 Instruction Manual

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2.5. Fail-safe

Note: Default settings in the parameter tables are indicated with an asterisk (*)
unless explicitly stated.
2.5.1. Material Level
Note: The default setting depends whether your device is a standard or
NAMUR NE 43-compliant device.
Defines the mA output to use when the Fail-safe Timer expires.
Options
Options
2.5.2. Timer
Note: When a Loss of Echo occurs Material Level (2.5.1.) determines the
material level to be reported when the Fail-safe timer expires. See
Echo (LOE)
Sets the time to elapse since the last valid reading, before the Fail-safe Level is
reported.
Values
2.5.3. Level
Notes:
• The default setting depends whether your device is a standard or NAMUR
NE 43-compliant device.
• Material Level (2.5.1.) must be set to VALUE to enable the Level value to be
reported.
Allows the user to define the mA value to be reported when the Fail-safe timer
expires.
Device Type
Values
7ML19985JP02
SITRANS LR200 (HART) – INSTRUCTION MANUAL
STANDARD DEVICE
HI
20.5 mA (max. mA Limit)
LO
3.8 mA (min. mA Limit)
*
HOLD
Last valid reading (default 22.6 mA)
VALUE User-selected value [defined in Level (2.5.3.)]
NAMUR NE 43-COMPLIANT DEVICE
HI
20.5 mA (max. mA Limit)
LO
3.8 mA (min. mA Limit)
HOLD
Last valid reading
User-selected value [defined in Level (2.5.3.): default
*
VALUE
3.58 mA]
on page 130 for more detail.
Range: 0.00 to 7200 seconds
Default: 100 s
STANDARD
Range
3.56 mA to 22.6 mA
Default
22.60 mA
Loss of
NAMUR NE43-
COMPLIANT
3.58 mA
Page 79

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