Why control systems at harvest time must not fail

At SF Electro-Engineering we repeatedly see the same pattern in this context: It is not the technology itself that is the problem, but the moment you touch it. When harvest is underway, every hour counts, so planning must be in place before the season starts, not during it.

Why is a grain collection point particularly vulnerable?

A grain collection point operates with an extreme peak load in a tightly defined time window. At the GCF Wohlen collection point, the intake capacity during harvest is 2,500 tons per day, and this performance must be available without interruption. Unlike systems with uniform utilization, this moment cannot be postponed.

This makes an unplanned control system failure during these weeks significantly more critical than in many other industries. This is also visible at Landi-Messen, because the historically grown silo systems must continuously carry the high tempo of the supply chain.

How is obsolescence distributed in such systems?

Obsolescence in grain collection points is often not concentrated in a single core system, but spread across many subsystems. For Landi-Messen, components such as grinding mills, mixers, cube presses, storage, drying, aspiration, and loading had to be networked. Each of these units may come from a different expansion phase and thus have its own lifecycle status.

From our experience, this coexistence makes the inventory more labor-intensive than for a single machine. In a recently conducted audit, we found an active power supply next to SIMATIC S7-400 assemblies with officially announced product discontinuation and an OP77B for which there is no pure software migration path left. For planning, this means: you do not just check the control, but each subsystem with its own condition and dependencies. The ability to track the movement and history of products and their components across different production, processing, and distribution stages.

Why is traceability today part of retrofit?

Traceability has long been a mandatory program in this industry. Requirements include batch numbers, quantity capture, and recipe management, for example in bagging and bagging processes. Older control systems from the S5 or early S7-300 generations were often planned before these data requirements became standard. Therefore retrofit is rarely just about spare parts provision. Often it is the moment when the plant becomes traceable.

How does SF Elektro-Engineering implement this in practice?

For the agricultural sector, SF Elektro-Engineering uses the sfAGROone industry solution. It bundles productivity gains, safety and standards, databases and interfaces, and plant availability—precisely the four aspects that come together at a seasonally timed grain collection point.

For Landi-Messen, it was crucial that the preparation phase and test runs took place in the in-house laboratory. This allowed latent problems to be addressed before the scheduled plant shutdown, and the retrofit on site stayed within the planned time window.

That is exactly the lever in a grain collection point: testing in advance shortens downtime where it cannot be postponed.

What should be planned before the next harvest?

• Set the retrofit window clearly outside the harvest period, not only after a fault occurs.
• Carry out the inventory subsystem by subsystem, not just check the central control.
• Consider traceability from the start, so batch and quantity capture do not have to be retrofitted later.

If you operate a grain collection point with older Siemens components, do not anchor the lifecycle to a single assembly. What matters is the interaction of all subsystems, the data requirements, and the retrofit at the right time window.

Frequently asked questions

Crucially, it is not only the lifespan of individual components but the control of the grain collection point as a whole. If you plan the retrofit early, by subsystem, with traceability in mind, you protect harvest downtime from unnecessary interruptions.

If you want to categorize the lifecycle of your control system at the grain collection point before the next season, now is the time to take the next step with an experienced partner in industrial automation.