ISO 9506-2-2003 PDF

Full title and description

St ISO 9506-2-2003 — Industrial automation systems — Manufacturing Message Specification (MMS) — Part 2: Protocol specification. This part of the ISO 9506 series defines the protocol-level message formats and exchange rules used to implement the abstract MMS services described in Part 1, enabling client–server communications for monitoring, control, file transfer and event/journal services in automated manufacturing and process systems.

Abstract

ISO 9506-2:2003 specifies the protocol used to carry the abstract services of the Manufacturing Message Specification (MMS) across a communication stack. It describes message types, PDU structures, encoding and decoding rules, association and release procedures, and the mapping required to realize service primitives defined in Part 1. The protocol is intended for use over reliable, full‑duplex networks and supports functions such as read/write of variables, event reporting, file transfer and journal access between clients and servers in industrial automation environments.

General information

• Status: Published (Edition 2).
• Publication date: July 2003.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.040.40 — Industrial process measurement and control.
• Edition / version: Edition 2 (ISO 9506-2:2003).
• Number of pages: 170 (approx.).

Scope

This standard defines the wire/protocol representation and exchange rules required to implement the MMS abstract services specified in ISO 9506-1. It covers the structure of protocol data units, association establishment and release, mapping of service primitives to messages, encoding conventions (ASN.1/BER mappings), error reporting and conformance requirements. The protocol is designed to operate over networks that provide reliable, full‑duplex communication and can be used over OSI stacks or adapted to TCP/IP transports where appropriate.

Key topics and requirements

• Protocol data unit (PDU) definitions for MMS service operations (read, write, event report, operating, file transfer, journal access, etc.).
• Association establishment, initiation, and release procedures between MMS client and server.
• Mapping of abstract service primitives (from Part 1) to concrete protocol messages.
• Encoding and decoding rules, including ASN.1 structures and BER/DER considerations for MMS PDUs.
• Conformance classes and requirements for implementing devices and applications.
• Error handling, diagnostics and status reporting mechanisms at the protocol level.
• Considerations for transport layering (OSI-based stacks and adaptations to TCP/IP/RFC 1006 where used).

Typical use and users

ISO 9506-2:2003 is used by industrial automation equipment manufacturers, SCADA and MES vendors, systems integrators, control system engineers and software developers implementing communication stacks and device firmware. Typical deployments include process control, factory automation, remote terminal units, and systems requiring interoperable client–server messaging for supervisory control, monitoring, telemetry, file transfer and event journaling.

Related standards

ISO 9506-1 (MMS — Part 1: Service definition) — other editions/earlier versions of ISO/IEC 9506; ASN.1 and encoding standards (ISO 8824 / ISO 8825); ACSE and OSI application-layer conventions; RFC 1006 (ISO Transport over TCP) and other transport adaptations commonly used to run MMS over TCP/IP; and industry-specific integration standards that reference MMS for device communications.

Keywords

MMS, Manufacturing Message Specification, ISO 9506, protocol specification, industrial automation, ASN.1, BER, client–server, SCADA, MES, VMD, file transfer, event reporting, journal.

FAQ

Q: What is this standard?

A: ISO 9506-2:2003 is Part 2 of the Manufacturing Message Specification series; it defines the protocol-level message formats and exchange rules used to implement MMS services for industrial automation.

Q: What does it cover?

A: It covers protocol data units (PDUs), message encodings, association procedures, error handling and the concrete mapping of abstract MMS services to wire-level messages so clients and servers can interoperate.

Q: Who typically uses it?

A: Device and equipment manufacturers, SCADA/MES vendors, system integrators, control engineers and software developers building interoperable automation communication stacks and applications.

Q: Is it current or superseded?

A: The referenced edition is ISO 9506-2:2003 (Edition 2). Users should check national or standards-body catalogues for any amendments or newer revisions applicable to their region or industry, but this edition is the established protocol specification for the MMS series.

Q: Is it part of a series?

A: Yes — ISO 9506 is a multi‑part series. Part 1 defines services (ISO 9506-1) and Part 2 defines the protocol (ISO 9506-2). Implementers typically use Part 1 and Part 2 together.

Q: What are the key keywords?

A: MMS, Manufacturing Message Specification, protocol, ASN.1, BER, industrial automation, client–server, SCADA, file transfer, event reporting.