Why it matters now: As global manufacturers grapple with rising downtime costs and a persistent skilled-labour shortage, the decades-old paradigm of cabinet-based motor control is quietly being dismantled — one production line at a time. Rockwell Automation's latest deployment at Ken's Foods offers a compelling proof point that on-machine drive architecture is no longer a niche experiment but a scalable blueprint for the factory floor.
Analyst Insight: Industry data suggests that unplanned downtime costs food and beverage manufacturers an average of $23,000 per hour. Decentralised architectures that place drives directly on equipment — rather than in remote cabinets — are emerging as a frontline defence against protracted PLC troubleshooting cycles.
The Shift from Cabinet-Based Control to On-Machine Architecture
On July 22, 2026, Rockwell Automation (NYSE: ROK) announced the successful modernisation of end-of-line operations at Ken's Foods, the well-known sauce and dressing producer. The project replaced traditional cabinet-based control systems with an on-machine architecture built around Rockwell's Armor PowerFlex 350 variable frequency drives (VFDs).
Instead of housing drives in large, climate-controlled electrical enclosures — often located dozens of metres from the equipment they control — the new architecture places VFDs directly on pallet-conveying systems. This proximity fundamentally changes how maintenance teams interact with both drives and the PLCs that orchestrate them.
Ken's Foods has now adopted on-machine architecture as its corporate standard for all future pallet-conveying systems, a decision that signals confidence in the technology's reliability in high-throughput food production environments.
Why Cabinetless Design Is Gaining Traction
For decades, the electrical cabinet has been the unchallenged default in industrial automation. But three converging pressures are forcing a rethink: the skilled-labour crisis makes every minute of troubleshooting precious, factory floor space commands a premium, and the sheer volume of cabling inside traditional cabinets creates fault-finding bottlenecks. On-machine solutions address all three simultaneously.
Key Advantages of On-Machine VFD Architecture
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Simplified PLC Troubleshooting: Operators and maintenance personnel can access drives directly on the equipment, eliminating the need to move between remote cabinets and the production line when diagnosing faults.
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Reduced Cabling Complexity: By mounting drives near motors, cable runs are dramatically shortened — reducing both material costs and potential points of failure.
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Improved Production Visibility: Drive status indicators and local diagnostics give floor personnel immediate line-of-sight insight into equipment health.
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Faster Installation: Pre-engineered on-machine solutions slash commissioning time compared to traditional cabinet builds.
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Space Reclamation: Smaller or eliminated cabinets free up valuable floor space for additional production capacity.
Market Trend: The global market for decentralised drive solutions is accelerating as food and beverage producers seek to reduce mean-time-to-repair (MTTR) metrics. Rockwell's Armor PowerFlex 350 series — purpose-built for harsh, washdown environments — is positioned at the intersection of this demand and the industry's broader push toward smart, connected operations.
How the PowerFlex 350 On-Machine Drive Works
The Armor PowerFlex 350 is an integrated, near-motor motor control solution designed specifically for environments where reducing installation time and cost is critical. Unlike conventional VFDs that require separate enclosures, the Armor series combines the drive, safety functions, and connectivity into a single field-mountable unit rated for harsh industrial conditions.
The drive communicates over Ethernet/IP — Rockwell's native protocol — maintaining seamless integration with Allen-Bradley PLCs. This means the on-machine architecture preserves the familiar Logix-based programming environment that plant engineers already know, while physically redistributing control closer to the action.
Real-World Impact at Ken's Foods
At Ken's Foods, the primary deployment zone has been end-of-line pallet-conveying systems — a critical junction where packaging meets logistics. Downtime at this stage cascades rapidly: palletisers stall, finished goods back up, and outbound shipments face delays. The ability to diagnose and resolve drive-related issues without navigating to a remote cabinet has reportedly streamlined maintenance workflows significantly.
Technical Specifications: Armor PowerFlex 350 at a Glance
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Communication Protocol: EtherNet/IP with integrated safety
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Mounting: On-machine, near-motor — no enclosure required
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Environmental Rating: Designed for harsh and washdown environments
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Integration: Native compatibility with Allen-Bradley Logix PLC platforms
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Safety: Integrated Safe Torque Off (STO) and advanced safety functions
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Scalability: Pre-engineered solution scalable across multiple conveyor zones
Analyst Insight: The decision by Ken's Foods to standardise on-machine architecture for all future pallet-conveying systems suggests that the technology has cleared the reliability bar in food manufacturing. Early adopters often hesitate to mandate new architectures across entire fleets; Ken's Foods' commitment signals operational confidence backed by measurable results.
What This Means for the Broader PLC and Automation Landscape
Rockwell's success at Ken's Foods is not an isolated event. It mirrors a wider industry pivot toward decentralised control architectures where intelligence lives closer to — or directly on — the machine. This trend has implications for how factories are designed, how PLC programs are structured, and how maintenance teams are trained.
For system integrators and OEMs, on-machine architectures reduce panel build complexity and free up enclosure real estate. For end users, the operational gains — faster troubleshooting, fewer cable faults, and clearer visibility — translate directly into higher overall equipment effectiveness (OEE).
The cabinet is not disappearing overnight. But as food and beverage manufacturers face unrelenting pressure to produce more with fewer people, the arithmetic increasingly favours architectures that put control where the work happens.
FAQ: On-Machine vs. Traditional Cabinet-Based VFDs
Q: Does on-machine architecture compromise drive longevity in harsh environments?
No. The Armor PowerFlex 350 is engineered with sealed, robust housings rated for washdown and high-humidity conditions typical in food and beverage plants — matching or exceeding the protection offered by cabinet installations.
Q: How does on-machine architecture affect PLC programming workflows?
Programmers continue working within the familiar Studio 5000 Logix Designer environment. The drives appear as standard EtherNet/IP nodes. The key difference is physical topology, not programming logic.
Q: Is retrofitting existing lines feasible, or is this only viable for new builds?
While greenfield installations offer the simplest path, retrofit scenarios are possible — particularly on modular conveyor sections. Rockwell offers engineering guidance for phased migration from cabinet-based to on-machine architectures.
Q: What is the typical ROI timeline?
Cost savings accrue from reduced cabling, smaller or eliminated cabinets, faster commissioning, and lower MTTR. Most operations report payback within 12–24 months, though results vary by scale and application complexity.
The Ken's Foods deployment marks a significant milestone in the maturation of on-machine motor control. As more manufacturers follow suit, the factory floor of the future will look markedly different — leaner, more accessible, and far less dependent on the electrical cabinets that have defined industrial automation for generations.
