scope:

This document is intended to be part of a series of standards that formalizes the access interfaces of Power System Monitors/Controllers (PSMC). The PSMC is an intelligent, user-configured, hardware/software system. This system incorporates one or more functional capabilities to detect analog and binary input signals, process and store acquired data, report information, and control power systems, including power plants and power plant support systems.

This standard specifies requirements for the human-machine user access language of power systems monitors/controllers. The standard defines language elements that support management functions that include, but are not limited to, Operations, Administration, Maintenance, and Provisioning (OAM&P) functions as defined in other American National Standards such as American National Standard for Telecommunications - Operations, Administration, Maintenance, and Provisioning (OAM&P) - Principles of Functions, Architectures, and Protocols for Telecommunications Management Network (TMN) Interfaces, ANSI T1.210-1993. The present issue of this standard addresses only the commands and responses that are required for human-machine interaction, that is:

- human-initiated commands that are capable of being recognized by a PSMC;

- human-interpretable responses from the PSMC resulting from recognizable humaninitiated commands; and

- human-interpretable responses from the PSMC resulting from nonrecognized human-initiated inputs, e.g., improperly formed commands or typing errors.

Future standards will address:

- interfaces between PSMCs and Operations System (OS)-like systems that perform systems management functions but are not located within a Telecommunications Management Network (TMN) environment;

- interfaces between power systems-oriented network elements and OSs that are located within a TMN environment.

Limitation of scope

This standard does not define either the algorithms or means of calculations. Such items as resolution, number of decimal places, and means of deriving averages are not within the scope of this standard.

It is not the intent of this standard that all aspects of this type of system be specified and standardized.

This standard is intended to meet the needs of those who engineer, install, operate, maintain, and provision power systems. At this time it may not fully comply with TMN standards in their present state of development. Future revisions are expected to further integrate standardization of TMN requirements with power systems access.

This standard does not inhibit innovation and the provision of functions, commands, and response structures which are in addition to those defined by this standard. This standard also provides flexibility for individual designers and users to adapt those portions of the standard that are needed for particular applications.

Purpose

Changes in the telecommunications industry have increased the need for detailed monitoring of power systems. However, no single standard exists that specifically addresses communications between machines, humans, and telecommunications power plants. The purpose of this document is to provide a user access language, i.e., a set of commands and responses, for the support of power systems management functions. The telecommunications industry, including both product developers and users of these products, stands to benefit from these standards in a number of ways:

- reduced development costs;

- reduced training costs;

- increased interoperability among a broad range of power systems monitoring and control equipment.