Defining and documenting binary logic systems so that all the stakeholders in the operation of a
facility can understand and use the information is challenging. Each reviewer has a different skill
set and knowledge of process control and yet each person has a need to glean the appropriate
information to meet his or her job requirements. The documents used to define the control functions
will have to be understandable to management, the process designer, the operations staff, the
maintenance technician, and the electrical and control system professionals, the logic device programmers
and the Supervisory Control and Data Acquisition (SCADA) system configurators.
There are a number of documents that have been developed to meet this wide range of needs.
This chapter addresses those documents.