41
58-640 PULSAR Model R96 Pulse Burst Radar Transmitter - F
OUNDATION
fieldbus
™
Instruction Manual
While changing any transmitter parameters using the local
display or through a system configuration tool (with the
MODE_BLK in OOS), the output might be inaccurate
because of the changing parameters. When the device is set
to OOS, the TRANSDUCER BLOCK will still output
level but the QUALITY will be shown as “Bad” and the
SUB_STATUS is “Out of Service.”
If the Model R96 fails to find a measurable level, the
TRANSDUCER BLOCK maintains the last good value as
the output and flags the failure. The QUALITY is “Bad,”
the SUB_STATUS is “Device failure” for no level, and the
LIMIT attribute is “Constant.”
Refer to Section 5.2 for additional information.
5.1.1 diagnostics (namur nE 107)
The PULSAR Model R96 transmitter includes an exhaus-
tive list of Diagnostic Indicators which follow the NAMUR
NE 107 guidelines.
NAMUR is an international user association of automation
technology in process industries, whose goal is to promote
the interest of the process industry by pooling experiences
among its member companies. In doing so, this group
promotes international standards for devices, systems, and
technologies.
The objective of NAMUR NE 107 was essentially to make
maintenance more efficient by standardizing diagnostics
information from field devices. This was initially integrated
via F
OUNDATION
Fieldbus, but the concept applies regard-
less of the communication protocol.
According to the NAMUR NE107 recommendation, "Self
Monitoring and Diagnosis of Field Devices," fieldbus diag-
nostic results should be reliable and viewed in the context of
a given application. The document recommends categorizing
internal diagnostics into four standard status signals:
• Failure
• Function Check
• Out of Specification
• Maintenance required
