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A Clock for the Manufacturing Systems Integration Testbed



Donald E. Libes


This paper describes a software module that provides timing services to the MSI, a Manufacturing Systems Integration Testbed in the automated factory.

The software alarm clock provides services to other MSI software including:

  • Synchrony
  • Real-time, or non-real-time adjusted in a variety of ways
  • Alarms at relative or absolute internals.

By providing a central time service, these services are provided more reliably, efficiently, and flexibly than could any client on its own.

This paper describes how the timing software was implemented, what its interfaces are, and how to design and write programs that use it.

NIST Interagency/Internal Report (NISTIR) - 4666
Report Number


automated factory, Manufacturing Systems Integration, real-time


Libes, D. (1991), A Clock for the Manufacturing Systems Integration Testbed, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 21, 2024)


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Created September 1, 1991, Updated November 10, 2018