SAINT-GOBAIN - GCP APPLIED TECHNOLOGIES
Project Name: North America SCADA & PLC
Modernization Program
Facility:- Santa Ana, California
- Irondale, Alabama
- Ajax, Ontario, Canada (Supervisory Site)
Scope:
Complete modernization of legacy GE Fanuc Intellution/iFIX SCADA and Allen-Bradley PLC-5 control systems across three manufacturing facilities.
Work included:
- Migration from PLC-5 platforms to Allen-Bradley CompactLogix
- Replacement of legacy DH+ and RIO networking with Ethernet/IP architecture
- Deployment of Ignition 8.1 SCADA platform
- Installation of new Windows Server-grade hardware (Ajax included PowerEdge R450 rack server)
- Kepware OPC/SQL integration and database configuration
- Recreation of HMI graphics with modern interface while maintaining operator familiarity
- Trending, historian, reporting, email/SMS alarming
- Remote access via IT-managed VPN
- Full demolition of obsolete PLC hardware and protocol networks
- Conduit routing and Ethernet infrastructure (runs up to 2,000 feet)
- Commissioning, SAT, operator training, and system documentation
System:
All three facilities operated on obsolete Allen-Bradley PLC-5 processors integrated with GE Fanuc SCADA platforms. Hardware support had been discontinued, creating increasing operational risk and difficulty sourcing spare parts.
Santa Ana and Irondale utilized PLC-5 processors with DH+ and legacy serial networking. Ajax operated using PLC-5 with Remote I/O (RIO) and Flex I/O racks, serving as the supervisory location for North America operations.
CEI standardized the architecture across all sites by implementing:
- Allen-Bradley CompactLogix processors
- Ethernet/IP networking
- Ethernet Flex I/O upgrades (Ajax retained existing Flex I/O modules and replaced communication adapters only)
- Centralized Ignition SCADA server with unlimited tags and clients
- SQL historian database
- Scalable architecture for future plant expansions
Ajax was engineered as the supervisory hub capable of managing and scaling with additional North American facilities.
The new architecture provides:
- Real-time data visibility across the plant network
- Unlimited SCADA clients (desktop, tablet, mobile)
- Historian and exportable data
- Modern alarm management
- Future-proof, firmware-consistent infrastructure
Benefit:
This modernization eliminated dependence on discontinued PLC-5 hardware and aging SCADA software, significantly reducing operational risk and spare-parts vulnerability.
The upgrade provided:
- Improved reliability and scan performance
- Standardized Ethernet/IP communication
- Centralized data capture and trending
- Expandable infrastructure for future production lines
- Reduced long-term maintenance costs
- Consistent architecture across North American facilities
By completing the infrastructure upfront rather than phasing fragmented upgrades, GCP received a clean, scalable, and supportable automation platform aligned across multiple sites.

