Information technology. Programming languages. PL/I general purpose subset Ingestion-build-47553 This part of IEC 61439

This part of IEC 61439 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO)

pressing a physical button or on-screen touch target button

This part of IEC 62453 specifies implementation of communication and other services based on IEC 62453-309

the tables have been recomputed

Information technology. Programming languages. PL/I general purpose subset Ingestion-build-47553 This part of IEC 614391 Scope and Overviews 1. 1 Scope This document defines the computer programming language PL I General Purpose Subset, referred to in most of this definition simply as "PL I". It is intended to serve as an authoritative reference rather than as a tutorial introduction. The language defined by this document is different from those of previous PL I standards, although substantially upward compatible, at the source program and semantic level. The