Exploring the ISA100.11a Standard. Exploring the ISA100.11a Standard. William (Bill) Ayers America s OneWireless Consultant.

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1 Exploring the ISA100.11a Standard March 2012 William (Bill) Ayers America s OneWireless Consultant Exploring the ISA100.11a Standard WHY Standards

2 World Leader SolutionsFocused Greatest Flexibility International Society of Automation Best Performance ISA100 formed in 2005; establishes standards that define procedures for the automation and control environment Focused on field level 400 automation professionals from around the world End users; wireless, DCS and PLC, instrument, and technology suppliers; system integrators; government agencies; etc.

3 Greatest Flexibility Greatest Flexibility With ISA100, customers will have a solution that is open, interoperable, scalable and reliable for their most critical applications. The ISA100.11a global wireless standard ISA100 technology is simple to deploy, reliable and supports traditional and future applications. ISA100 Wireless Compliance Institute The most choice available Standardization Benefits Wide choice of products for wireless automation solutions Interoperability of multi-vendor products Reduced costs for users and equipment suppliers Reduced deployment time of wireless products and systems Focused and effective product developments by suppliers Standardization body provides a single forum for voicing needs Open standard, user driven

4 What is the ISA100.11a Standard? The ISA100.11a standard provides reliable and secure wireless operation for non-critical monitoring, alerting, supervisory control, open loop control, and closed loop control applications. - The standard defines specifications of protocol suite system management gateway security - Specifications for low-data rate wireless connectivity with fixed, portable and moving devices supporting very limited power consumption requirements. The standard addresses performance needs of applications such as monitoring and process control where latencies on the order of 100ms can be tolerated. Fundamentals of ISA100.11a The ISA100.11a wireless standard is an open communications protocol The Standard is flexible and supports a wide range of application layer and sensor layer protocols, i.e. Profibus, HART, Fieldbus Foundation, etc. The Standard uses the OSI seven layer model for design basis, leveraging existing standards and interfaces Physical and data link layers use the IEEE radio standard referencing the 2.4 GHz frequency band for global deployment Allows users to define sensor star topology or mesh networks, providing flexibility of security and battery life Star Mesh

5 A Single Wireless Network ISA100.11a Topology

6 ISA100.11a Devices I/O Device - measures a physical value and sends measurement to router Router - routes wireless messages to create a multi-hop mesh network Gateway - converts from wireless communication protocol to legacy wired protocols and firewalls wireless subnet from plant network System Manager - supports devices joining/leaving, allocates and manages communications resources (time slots, communications contracts, routes, etc) and serves as proxy for Security Manager Provisioning Device - issues keys to field devices ISA100.11a Valued Characteristics Incorporates Data Reliability Mechanisms - frequency diversity and adaptive frequency hopping - time diversity and determinism - collision avoidance ( clear channel assessment ) - path diversity and duocast. Incorporates Data Security Mechanisms - data encryption (AES-128 block ciphers) - message authenticity - time security - real time key redistribution Frequency diversity via channel hopping Pre-determined data time slots - short, long, shared, idle

7 ISA100.11a Valued Characteristics Optimizes Device Power Usage - deterministic network scheduling - field instruments allocated precise Tx/Rx timeslots - non-routing nodes - adjustable power levels for radio Single Plant Network - accommodates multiple protocols at device and host - protocol tunneling Sleep mode = more energy Allocated Tx / Rx timeslots ISA100 Wireless Compliance Institute (WCI) Mission is to reduce cost, time, and risk Accredits independent test labs to conduct product conformance testing Provide education, tools, and technical support to users and suppliers Assures interoperability Maintains registry and publishes certified listing of products -

8 Why do You want a Standards Based System To Work Smarter To Work as a Team Safety for You and Your Co- Workers

9 Thank You