Process variables and manipulated variables are the most important pieces of information from the devices. NAMUR has identified that the status of the devices themselves is also important to help the plant operators run the plant better. This requirement is captured in their NE107 recommendation.
NE107 recommends that operators need a view of the process including the status of the instrumentation in a simple and uniform way regardless of source device.
The NE107 recommendation defines that detailed device-specific diagnostics are summarized as four simple status signals. These signals ensure that the plant operator is not inundated with device troubleshooting details and cryptic error codes. The NAMUR NE107 recommendation harmonizes the display of status for devices.
Intelligent Device Management (IDM) software based on EDDL make use of NE107 for device diagnostic alarm filtering and dashboard displays etc.
Technical White Papers
Tutorial: NAMUR NE107
Device Diagnostics Deployment and Adoption Guide
Fieldbus diagnostics: Latest advancements optimize plant asset management
A Complete Turnaround (Control Engineering Asia, April 2013)
Requirements regarding self-monitoring and diagnosis in field instrumentation
What is NAMUR?
NAMUR is the international user association of automation technology in process industries
What is NE107?
NE 107 is a recommendation from the NAMUR organization for “Self-Monitoring and Diagnosis of Field Devices” explaining how to make use of diagnostics in intelligent devices
Why display device diagnostics to the operators?
The status of the devices is useful and can help the plant operator to take action as required on the process the device is controlling. See also ISA 18.2 clause 3.1.46
What is a ‘status signal’?
A status signal summarizes the health of the device based on device self-diagnostics and is displayed as one of four categories:
• Out of Specification
• Maintenance Required
• Function Check
How each diagnostic maps to which category can be configured in the device. Learn more from the NE107 tutorial and the Device Diagnostics Deployment and Adoption Guide
Will device diagnostics distract the operators?
No. The plant operator is only displayed the simple status signal in order to not be inundated in troubleshooting details.
Where is NE107 implemented?
NE107 is implemented in control systems, Intelligent Device Management (IDM) software part of Asset Management Systems (AMS), and in devices as well as in the EDDL files that integrate these systems and devices. Make sure systems and devices have been tested and registered to support NE107
What action does an operator take on status signals?
The action the operator might take, besides informing a specialist, might include switching the affected loop to manual mode, or send somebody to the field to operate valve by hand.
What do the NE107 status signals look like and what do they mean?