Description

The P188.R2 is a high-performance,redundant process controller module at the heart of EMERSON’s Ovation distributed control system(DCS).Designed for mission-critical applications in power generation,oil&gas,and heavy industry,it executes real-time control logic—including safety interlocks like Master Fuel Trip(MFT)and Emergency Trip System(ETS)—with deterministic scan cycles as fast as 20 milliseconds.Featuring dual independent CPUs,synchronized memory,and fault-tolerant communication,the P188.R2 ensures continuous,uninterrupted operation even during hardware or network failures.

As the central brain of the Ovation architecture,the P188.R2 integrates field data from I/O processors(e.g.,P144.R4)and smart transmitters,runs complex regulatory and sequential logic,and delivers secure,time-stamped data to operator workstations,historians,and asset management systems—all while meeting stringent regulatory requirements for functional safety and cybersecurity.

Application Scenarios

At a 1,600 MW combined-cycle power plant in California,operators faced recurring turbine trips due to timing inconsistencies in legacy controllers during rapid load changes.After upgrading to EMERSON P188.R2 controllers,the plant achieved rock-solid coordination between combustion controls,steam bypass valves,and generator breaker logic.The P188.R2’s 20 ms scan cycle—coupled with synchronized I/O from P144.R4 chassis—ensured that all 128 discrete trip conditions were evaluated within a single,deterministic window.During a grid frequency emergency,the system executed a full load rejection sequence without spurious actuation,preserving equipment integrity.Additionally,integrated cybersecurity features(including secure boot and role-based access)satisfied NERC CIP audit requirements out-of-the-box.Plant engineers now describe the P188.R2 as“the silent conductor of our entire control symphony.”

Parameter

Main Parameters Value/Description

Product Model P188.R2

Manufacturer EMERSON

Product Category Redundant Process Controller for Ovation DCS

CPU Architecture Dual independent 64-bit processors with lockstep verification(optional)

Scan Cycle Time Configurable:20 ms to 1000 ms(default 100 ms;20–50 ms for high-speed safety logic)

Redundancy Full hot-standby with<50 ms failover;automatic state synchronization

Memory 4 GB RAM(expandable),32 GB solid-state storage for logic,logs,and firmware

Communication Interfaces-Dual redundant 1 GbE ports(IEEE 802.3)

-Optional fiber optic SFP modules

-Dedicated service port for diagnostics

Supported Protocols Ovation proprietary,Modbus TCP,OPC UA,HART pass-through via I/O modules

Programming Standards IEC 61131-3(LD,FBD,ST,SFC),Ovation Control Language(OCL)

Operating Temperature 0°C to+60°C(derated above 50°C)

Certifications UL 61010-1,CSA C22.2 No.61010-1,CE,RoHS,NERC CIP-ready,IEC 62443 compliant

Technical Principles and Innovative Values

Innovation Point 1:True Deterministic Real-Time Execution

Unlike general-purpose industrial PCs,the P188.R2 runs a real-time operating system(RTOS)optimized for sub-50 ms logic execution—ensuring that safety sequences like boiler purge or turbine overspeed protection respond predictably under all load conditions.

Innovation Point 2:Seamless Redundancy with Zero Data Loss

The primary and backup P188.R2 units continuously synchronize application state,I/O data,and alarm buffers.In the event of a failure,the standby unit assumes control without reinitializing logic or dropping a single scan—critical for continuous processes.

Innovation Point 3:Embedded Cybersecurity by Design

Features include secure boot(verifying firmware integrity),encrypted communication,user authentication,and audit logging—aligning with IEC 62443 and NERC CIP standards without requiring external firewalls.

Innovation Point 4:Unified Engineering&Diagnostics

Using Ovation Explorer,engineers can develop,test,deploy,and troubleshoot logic on the P188.R2 without downtime.Real-time variable monitoring,breakpoint debugging,and historical trend replay accelerate commissioning and root-cause analysis.

Application Cases and Industry Value

During a lignite-fired power plant modernization in Germany,the engineering team replaced obsolete Westinghouse WDPF controllers with EMERSON P188.R2 units to support new EU emissions directives.The challenge?Integrating over 5,000 I/O points into a single control strategy for SCR(Selective Catalytic Reduction)and electrostatic precipitator optimization.The P188.R2 not only handled the computational load but also enabled closed-loop NOx control using HART data from Rosemount analyzers—routed through 5X00846G01 AI modules.Within six months,NOx emissions dropped by 22%,and ammonia slip was reduced by 35%.During a surprise grid outage,the redundant P188.R2 pair executed a controlled ramp-down while maintaining baghouse cleaning sequences—preventing filter clogging and avoiding a 3-day restart delay.Regulators praised the system’s auditable,time-synchronized event logs as“best-in-class for environmental compliance.”

Related Product Combination Solutions

P144.R4:I/O processor that feeds field data to the P188.R2 with precise timing.

5X00846G01/5X00594G01:High-density analog and digital I/O modules managed under P188.R2 logic.

5X00101G01:Legacy Ovation controller;P188.R2 offers 10x performance and modern security.

Ovation Workstation:Operator interface that displays P188.R2-driven graphics,trends,and alarms.

Ovation Historian:Captures time-synchronized data from P188.R2 for performance analysis and compliance reporting.

Rosemount Analyzers&Transmitters:Smart field devices whose HART data is processed by P188.R2 logic.

DeltaV SIS:For hybrid safety architectures where Ovation(P188.R2)handles BPCS and DeltaV handles SIL 2/3.

AMS Device Manager:Leverages P188.R2 communication paths to monitor asset health across the plant.

Installation,Maintenance,and Full-Cycle Support

The P188.R2 installs in a standard Ovation controller rack with dual power supplies and redundant network switches.Configuration is performed via Ovation Explorer,which auto-detects the module and enforces version-controlled deployment.Firmware updates can be applied online in redundant systems without process interruption.

Maintenance is proactive:the controller logs CPU load,memory usage,communication errors,and scan jitter—enabling predictive interventions.Failed units are hot-swappable in redundant pairs,with full configuration restored automatically from the peer unit.

We supply only genuine,factory-tested EMERSON P188.R2 controllers,each validated for:

168-hour thermal stress testing

Redundancy failover under full I/O load

Cybersecurity boot integrity checks

Logic execution timing verification

Every unit includes a 12-month warranty,full diagnostic report,and global technical support.We also offer lifecycle services—including obsolescence planning,migration from Bailey INFI 90 or WDPF,and cybersecurity hardening assessments.

Contact us for a tailored solution—whether you’re upgrading for reliability,meeting emissions mandates,or building a new greenfield power island.With authentic EMERSON P188.R2 controllers and expert integration,your control layer becomes not just intelligent,but unbreakably resilient.

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