In the previous chapter, we presented the Lubrication domain, which is part of an Automatic Lubrication System (ALS). The Lubrication domain delegates to a Signal I/O (SIO) domain controlling and obtaining the necessary data about the lubricated machinery. In this chapter, we describe the SIO domain and show how sensing and control over the external world is accomplished.
From the point of view of the whole ALS, we are producing side effects in the outside world. ...