How PLCs Power Case IH's Axial-Flow 160 Harvest Automation
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How PLCs Power Case IH's Axial-Flow 160 Harvest Automation
The line between factory floor and farm field is blurring fast. Case IH's announcement of Model Year 2027 updates for its Axial-Flow 160 series combines is rather than just an agricultural equipment story , it is a definitive signal that ruggedized programmable logic controllers (PLCs) have become the operational backbone of mobile industrial machinery. The Harvest Command combine automation system, first
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For the global industrial automation sector, this development underscores a critical growth vector: PLCs are no longer confined to static production lines. They are now harvesting grain at 25 tonnes per hour, adjusting rotor speeds, fan settings, and sieve clearances autonomously while navigating uneven terrain at speed.
The agricultural machinery PLC market is projected to grow at a compound annual rate exceeding 7% through 2030, driven by precision farming mandates and labor shortages. Case IH's decision to factory-fit advanced automation into mid-range combines signals that OEMs now view PLC-based intelligence as a baseline expectation , not a premium upsell.
The Axial-Flow 160 series leverages a distributed control architecture where multiple ruggedized PLCs communicate across CAN bus and ISOBUS networks. Each controller manages discrete subsystems , threshing, separation, cleaning, and residue management , while a central supervisory controller synthesizes sensor data to make holistic harvesting decisions in real time.
Unlike the ladder-logic-dominated PLC applications of traditional manufacturing, the Harvest Command system employs a hybrid architecture combining IEC 61131-3 structured text programming with proprietary machine-learning models embedded at the controller level. This enables the combine to optimize grain quality and throughput simultaneously , a multivariable control problem that would overwhelm manual operators.
Continuous closed-loop adjustment based on crop moisture, density, and feed rate sensors
Dynamic positioning via electro-hydraulic actuators responding to grain damage thresholds
Forward velocity synchronized with crop loading to prevent choking or underutilization
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