Fail-Safe - Siemens SITRANS LR560 Operating Instructions Manual

2.5. Fail-safe

Notes:
• Default settings in the parameter tables are indicated with an asterisk (*) unless
explicitly stated.
• The default setting depends whether your device is a standard or NAMUR NE
43-compliant device.
a)
NE43 device part number ends with -Z NO7.
2.5.1. Material Level
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.
Sets the time to elapse since the last valid reading, before the Fail-safe Level is
reported.
Values
2.5.3. Level
Notes:
• 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.
Values
A5E34647946 SITRANS LR560 (mA/HART) – OPERATING INSTRUCTIONS
a)
HI 20.5 mA (max. mA Limit)
LO 3.8 mA (min. mA Limit)
* HOLD Last valid reading (default 22.6 mA)
User-selected value [defined in Level (2.5.3.): default
VALUE
3.56 mA]
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
3.56 mA]
Range: 0.00 to 720 seconds
Default: 100 s
Range 3.56 mA to 22.6 mA
Default 3.56 mA
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