Section 8 Control Loop Asset Monitor (Clam); Introduction - ABB 800xA Operation

Section 8 Control Loop Asset Monitor (CLAM)

Introduction

Control Loop Asset Monitors (CLAM) are set up in the 800xA System to monitor
control loops. They display the complex analysis of control loops in a user friendly
manner in real time.
Each Control Loop Asset Monitor is associated with its own control loop. The
controllers continuously provide process value (PV), set point (SP), and control
output (CO) data. This data is captured by the 800xA System as OPC data. The
Control Loop Asset Monitor is configured to receive PV, SP, and CO data from its
control loop into its Asset Monitor Input Parameters.
After sufficient data is collected, it is sent to the CLAM auditing logic. Using the
Matlab runtime library with this data, the auditing logic performs loop analysis and
sends the results back as loop diagnosis. The loop diagnosis is published by the
Control Loop Asset Monitor Aspect of the Control Loop Asset Monitor Ex object
type instance.
The Control Loop Asset Monitor provides user friendly access to the control loop
diagnosis information for a large number of controllers. This information is
organized so that it is quick and easy to read and interpret. Multiple stages of loop
failure modes are provided, so that a problem can be detected and rectified before it
becomes too severe and affects plant operation.
Additional details are provided that are easy to access. These include input data
Trend Display to show input data. Diagnosis log files show history of diagnosis
results values. Output Records show indices values for in-depth analysis of loop
condition.
This section describes Control Loop Asset Monitor operation. It assumes that
installation, post installation, and configuration procedures are complete.
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