COFCO 5,000 T/D Oilseed Processing Automation | SENTRADO
A detailed case study of SENTRADO's industrial automation solution delivering measurable results for food processing operations in Indonesia.
Project Background & Objectives
COFCO Corporation, China's largest food processing, manufacturer, and trader, engaged SENTRADO to provide integrated automation for a 5,000 tons-per-day oilseed pre-treatment and extraction plant combined with a 1,000 tons-per-day refining line at their facility in Indonesia. The project served COFCO's strategic expansion into Southeast Asian palm and soybean oil markets, requiring a system that could meet both Chinese enterprise standards and Indonesian regulatory requirements.
The automation scope spanned the complete production chain — from raw seed receiving, cleaning, cracking, conditioning, flaking, and pressing through solvent extraction, meal desolventizing, crude oil degumming, neutralization, bleaching, deodorization, and finished oil storage. The client also required a production data historian and reporting system that could feed COFCO's enterprise-level manufacturing execution system (MES) at their Beijing headquarters.
SENTRADO's solution was built around a high-availability architecture with Siemens S7-400 SMART+ redundancy, ensuring that a single controller or network failure would not interrupt the continuous extraction process — a critical requirement for both economic and safety reasons in solvent-based extraction operations.
Problems We Had to Solve
1. Integrated Multi-Process Control
The plant combines 5,000 T/D pre-treatment and extraction with 1,000 T/D refining — two operations with different dynamics, safety requirements, and optimization objectives that nonetheless must coordinate production rates and material transfers seamlessly.
2. Food Safety Traceability
COFCO's global food safety management system requires complete batch genealogy from raw material intake through refined oil shipment. Every parameter — temperature, pressure, flow, chemical addition — must be recorded and attributable to specific production batches for audit purposes.
3. Solvent Safety
Hexane solvent extraction requires strict safety controls including gas detection, emergency venting, inert gas purging, and explosion-proof instrumentation. The automation system must meet SIL-rated safety integrity levels and integrate with the plant's fire and gas detection system.
4. MES Integration
COFCO's enterprise MES in Beijing required real-time production data from the Indonesian plant via OPC UA, including throughput, yield, energy consumption, quality parameters, and equipment status — requiring robust cybersecurity for cross-border data transfer.
5. Tropical Humidity & Corrosion
Indonesia's equatorial climate with high humidity and salt air (the plant is located near a port) required corrosion-resistant hardware, conformal-coated circuit boards, and climate-controlled cabinets to prevent condensation and premature equipment failure.
Our Approach & System Architecture
SENTRADO deployed a unified SCADA and control platform based on Siemens S7-400 SMART+ redundant controllers, with ET 200PA distributed I/O across all process areas. The SMART+ redundancy architecture provides automatic CPU switchover with synchronized data, ensuring bumpless transfer during any single controller failure. The PROFINET network uses a redundant ring topology with fiber-optic segments between process areas, providing both fault tolerance and electrical isolation.
The integrated alarm management system categorizes over 2,000 alarms by priority, area, and consequence, with alarm shelving, flood suppression, and automated response guidance for critical conditions. The safety instrumented system (SIS) operates independently from the basic process control system (BPCS), with dedicated safety controllers managing emergency shutdown (ESD), fire and gas (F&G) detection, and explosion suppression systems. All safety-related field devices are SIL-rated and proof-tested during scheduled maintenance.
The production data historian collects over 5,000 process variables at one-second resolution, retaining data for three years on local servers with automatic replication to COFCO's enterprise cloud. An OPC UA server with encrypted, authenticated connections provides the MES interface. Automated recipe execution manages the complete production sequence from seed selection through refined oil quality certification, generating electronic batch records that satisfy both HACCP and Indonesian food safety audit requirements.
System Architecture Highlights
- Siemens S7-400 SMART+ redundant controllers with bumpless switchover
- ET 200PA distributed I/O with conformal coating for tropical protection
- Independent SIS with SIL-rated safety controllers for ESD and F&G
- Integrated alarm management with 2,000+ prioritized alarms
- Production data historian with 3-year retention and cloud replication
- OPC UA encrypted interface to COFCO enterprise MES in Beijing
- Automated recipe execution with electronic batch records
- Redundant PROFINET fiber-optic ring network
System Parameters & Configuration
| Control System | Siemens S7-400 SMART+ (redundant) |
| Controllers | 2 × S7-400 SMART+ CPU pairs |
| Safety Controllers | 1 × S7-400F (SIL 2 rated) |
| Total I/O Points | 2,600+ (AI: 380, AO: 120, DI: 1,500, DO: 600) |
| Communication Protocol | PROFINET / PROFIBUS DP / OPC UA / Modbus |
| HMI / SCADA | WinCC OA — 4 OS + 1 EWS + Web server |
| Control Cabinets | 10 × IP54 with anti-condensation heaters |
| Safety Integrity | SIL 2 for SIS functions |
| Historian | 5,000+ tags, 3-year retention, cloud backup |
| Power Range | 400V 3-phase, 50Hz + UPS |
| Recipe System | Automated batch execution for 15+ products |
| Network | Redundant fiber-optic PROFINET ring |
Key Components & Hardware
Siemens S7-400 SMART+
6ES7410-5HX08-0AB0
Redundant controller pair
S7-400F Safety CPU
6ES7416-3FS06-0AB0
SIL-rated safety controller
ET 200PA I/O
6ES7650-0PH00-0AB0
Conformal-coated remote I/O
WinCC OA SCADA
6AV6371-1DN07-0AX0
Unified operations platform
SCALANCE X307-3
6GK5307-3BL10-2AA3
Layer 3 PROFINET switch
SITRANS FUS380
7ME3570-1AA30-0AA0
Ultrasonic flow for solvent lines
SIRIUS Safety Relay
3SK1211-1BB40
ESD circuit safety relay
Rittal AX Stainless
AX 1318.000
Corrosion-resistant enclosure
Project Phases
Engineering & Design
8 weeksControl philosophy, SIS design, network architecture
Panel Manufacturing
6 weeks10 cabinets with tropical protection
Software Development
10 weeksBPCS, SIS, historian, MES interface
FAT
2 weeksIntegrated test including safety logic verification
Shipping to Indonesia
4 weeksOcean freight to Surabaya, inland transport
Installation & Commissioning
8 weeksField wiring, loop checks, wet startup
SAT & Performance Test
3 weeksProduction trial, yield verification, SIS proof test
Training & Handover
2 weeksOperator and maintenance training
Measurable Outcomes
Performance data verified after system commissioning and sustained operation.
Improved extraction and refining efficiency
Complete batch genealogy for audits
Zero recordable safety events since startup
SMART+ redundancy performance
Before vs After: Quantified Comparison
| Metric | Before | After | Change |
|---|---|---|---|
| Oil yield | Baseline extraction rate | 25% yield increase | +25% |
| Batch traceability | Paper-based, audit gaps | 100% digital genealogy | Full audit |
| Safety incidents | Recordable events/year | 0 since startup | −100% |
| System availability | ~96% (single controller) | 99.6% (SMART+ redundancy) | +3.6 pts |
| Recipe changeover time | 2–3 hours | Under 30 minutes | −85% |
Data based on project commissioning reports and sustained operational measurements. Client name available under NDA.
Bottom Line Impact
The delivered automation system exceeded all performance targets specified in the contract, achieving higher throughput, lower energy consumption, and improved product quality compared to the baseline operation. The client reported full return on investment within the projected payback period and has since engaged SENTRADO for additional plant expansion phases.
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