Emerson Rosemount, Reference Manual

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154
Reference Manual
00809-0100-4021, Rev GC
Section 4: F
OUNDATION
fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
4.8 Hot Backup
™
transducer
Note
Primary Value 1 indicates Sensor 1 value and Primary Value 2 indicates Sensor 2 value.
Sensor 1 as a default sensor
Sensor 2 as a default sensor
Hot Backup parameters Sub parameter Description Values to be set
FEATURE_CONFIG
FEATURE_ENABLE Select the feature Hot Backup
DEFAULT_SENSOR Set default sensor, either Sensor 1 or Sensor 2 Sensor 1
UNIT_INDEX Set unit of measurement Deg C
FEATURE_VALUE
FEATURE_STATUS This value changes dynamically N/A
FEATURE_VAL This value changes dynamically N/A
Primary value
1 status Primary
value 2 status FEATURE_VAL /
FEATURE_STATUS
Recommended action
Good Good Primary Value 1/Good No Error
Good Uncertain Primary Value 1/Good Sensor 2 out of operating range or Sensor 2 Degraded.
Good Bad Primary Value 1/Good Sensor 2 Open or short or Beyond operating range
Uncertain Good Primary Value 2/Good Hot Backup Active and (Sensor 1 out of operating range or
Sensor 1 Degraded)
Uncertain Uncertain Primary Value 1/Uncertain ((Sensor 1 out of operating range or Sensor 1 Degraded)
and (Sensor 2 out of operating range or Sensor 2
Degraded)) or Drift Alert
Uncertain Bad Primary Value 1/Uncertain (Sensor 1 out of operating range or Sensor1 Degraded)
and (Sensor 2 Open or short or Beyond operating range)
Bad Good Primary Value 2/Good Hot Backup Active and Sensor 1 open or short or Beyond
operating range
Bad Uncertain Primary Value 2/Uncertain Hot Backup Active and Sensor 1 open or short or Beyond
operating range and (Sensor 2 out of operating range or
Sensor 2 Degraded)
Bad Bad None (Last good value)/Bad Hot Backup Active and (Sensor 1 open or short or beyond
operating range) and (Sensor 2 open or short or beyond
operating range)
Primary value
1 status Primary
value 2 status FEATURE_VAL /
FEATURE_STATUS
Recommended action
Good Good Primary Value 2/Good No Error
Good Uncertain Primary Value 1/Good Hot Backup Active and Sensor 2 out of operating range or
Sensor2 Degraded
Good Bad Primary Value 1/Good Hot Backup Active and Sensor 2 Open or short or Beyond
Operating range
Uncertain Good Primary Value 2/Good Sensor 1 out of operating range or Sensor 1 Degraded
Uncertain Uncertain Primary Value 2/Uncertain ((Sensor 1 out of operating range or Sensor 1 Degraded)
and (Sensor 2 out of operating range or Sensor 2
Degraded)) or Drift Alert
Uncertain Bad Primary Value 1/Uncertain Hot Backup Active and (Sensor 1 out of operating range or
Sensor 1 Degraded) and (Sensor 2 Open or short or Beyond
operating range)
Bad Good Primary Value 2/Good Sensor 1 open or short or Beyond operating range
Bad Uncertain Primary Value 2/Uncertain Sensor 1 open or short or Beyond operating range and
(Sensor 2 out of operating range or Sensor 2 Degraded)
Bad Bad None (Last good value)/Bad Hot Backup Active and (Sensor 1 open or short or beyond
operating range) and (Sensor 2 open or short or beyond
operating range)