Tag: PLC obsolescence

  • Why We Are Giving Away Our Shutdown Planning Checklist

    Why We Are Giving Away Our Shutdown Planning Checklist

    The Most Expensive Week on Your Production Calendar

    Ask any engineering or maintenance manager in a beverage or FMCG plant to name the most stressful week of their year and the answer is rarely a breakdown. It is the planned shutdown. A shutdown is the one window where every deferred job, every capital project and every compliance item competes for the same few days, with a restart date that production has already promised to the business. Every hour of that window is paid for twice, once in labour, parts and contractor costs, and again in the production the line is not running.

    After more than 25 years of shutdown and project work in Australian beverage and FMCG plants, we have seen shutdowns that restarted early and shutdowns that dragged a week past their date. The difference between them is almost never how hard people worked during the window. It is the quality of the scoping and planning done in the weeks before anyone picked up a tool. That conviction is why we have put our shutdown planning approach into a practical document, the FMCG and Beverage Plant Shutdown Planning Checklist, and made it freely available to download from our website.

    EM10323 HDR
    EM10318 HDR

    Why Give It Away?

    The honest answer is that well planned shutdowns are better for everyone, including us. When we arrive on site for shutdown work, the jobs that run smoothly are always the ones where the scope was locked early, the parts were sighted on the shelf, and the control system changes were written and tested before the window opened. The jobs that turn into overruns are the ones scoped on the back of a purchase order three weeks out.

    We would rather work with plants that plan properly, and we would rather be part of that planning early, when engineering input can still change the outcome. Sharing the checklist costs us nothing except a few trade secrets that were never really secrets, because none of this is complicated. It is simply the discipline of doing the right things in the right order, starting earlier than feels necessary.

    There is also a simpler reason. Our business is family owned and has been built over decades on long relationships with manufacturers, from the largest names in Australian beverage production through to smaller regional operations. Useful, practical help has always been how those relationships start.

    What Poor Planning Actually Costs

    The visible cost of an overrun is easy to calculate: extra contractor hours, weekend penalty rates, expedited freight on the part that should have been ordered six weeks earlier. The larger cost is the one on the production side. A high speed canning or bottling line produces enormous value per hour, and every hour the restart slips is product that was promised to customers and is now not coming. In a contract packing environment, a late restart can mean penalties or a customer quietly moving volume elsewhere.

    Then there are the costs that never appear on a spreadsheet. Work rushed at the end of an overrunning shutdown is work done tired, under pressure, with testing compressed or skipped. That is how a shutdown intended to improve reliability ends up causing the next three months of niggling faults. It is also how safety shortcuts happen, and in our view no schedule is worth that.

    Against all of this, the cost of proper planning is a few structured meetings, a master work list, and the discipline to order long lead items on time. It is the cheapest insurance available in plant engineering.

    EM10104 HDR

    Where Shutdowns Go Wrong

    The failure patterns repeat across almost every site. Scope arrives late, added in the final fortnight by people who were not in the early meetings, and every late addition bumps something else off the critical path. Long lead items are ordered on optimistic assumptions, so the gearbox or the PLC hardware arrives the day after the window closes. Contractor crews are booked late in shutdown season, when the good tradespeople are already committed. And control system work is treated as something that happens during the shutdown, rather than something developed and bench tested beforehand, so the window that should have been used for installation and commissioning gets consumed by programming.

    That last one deserves special attention, because it is the most common gap we see. PLC changes, HMI updates, drive replacements and safety circuit modifications all need engineering time before the shutdown and structured testing time during it. When we delivered the automated control system for two glycol refrigeration units cooling large beer tanks, built on a Siemens 1500 series PLC, the logic was developed and proven before installation, which is precisely why commissioning went to plan. The same applied to the hot water rinse system we implemented for a can seamer clean in place process on a Siemens 1200 series platform. Control work rewards preparation, and punishes improvisation.

    What the Checklist Covers

    The checklist is a working document, not a glossy brochure. It walks through six phases of a shutdown, starting eight to twelve weeks out and finishing after the line is handed back. The early sections cover building a single master work list across mechanical, electrical and automation scopes, ranking every job by production risk, and identifying the design, fabrication and long lead items that decide your critical path. The middle sections deal with parts, people and engineering readiness: confirming deliveries in writing, locking in contractor crews, backing up every PLC, HMI and drive parameter set, and walking every job at the machine before the window opens.

    The later sections cover the shutdown itself and what follows: protecting the critical path shift by shift, testing safety functions as they are reinstated, recommissioning system by system, and holding the review that makes the next shutdown easier. Each item exists because we have watched its absence cost a plant real money.

    One recommendation in the checklist is worth highlighting here. A shutdown window is the cheapest opportunity you will ever get to deal with control system obsolescence. Legacy Allen Bradley and Siemens hardware moves steadily through manufacturer lifecycle stages, and a planned migration during a scheduled window costs a fraction of an emergency migration after a failure. If your site has processors that have run untouched for fifteen years, the next shutdown is the time to act, and the checklist prompts you to assess exactly that.

    EM10307 HDR

    How to Use It

    Download it, print it, and take it into your next shutdown planning meeting. Mark it up, argue about it, and adapt it to your site, because every plant has its own quirks and no generic document survives contact with a real production line unchanged. Its job is to make sure the right questions get asked early enough for the answers to matter.

    Use it alongside your existing maintenance systems rather than instead of them. The checklist does not replace a CMMS or a project plan. It sits above them as a sanity check that the fundamentals, scope discipline, long lead items, controls preparation, testing and handback, are actually covered.

    Planning a Shutdown? Talk to Us Early

    BevTech Engineering and Automation delivers shutdown work across mechanical, electrical and automation scopes from our Richlands base in Brisbane, with our own machine shop for fabrication and change parts, TUV certified functional safety engineers for compliance work, and deep experience on Allen Bradley and Siemens PLC platforms. The plants that get the most value from us are the ones that involve us at the scoping stage, when engineering input can still shape the plan rather than rescue it.

    The checklist is available to download now on our website. And if there is a shutdown on your horizon, whether it is three months away or next year, reach out through the contact form on our website and talk it through with our team while the calendar is still your friend.

  • Spare Parts and Obsolescence Management for Legacy PLCs

    A Risk That Builds Quietly

    Programmable logic controllers do not fail often, but when a legacy PLC does fail on a critical production system, the consequences can be severe if a replacement is not readily available. Many FMCG manufacturers are running control systems installed a decade or more ago, on hardware platforms that manufacturers such as Allen Bradley and Siemens have since superseded, moved to reduced support status, or discontinued entirely. Obsolescence risk on these systems tends to build quietly over years, largely invisible during normal operation, until the moment a component fails and a replacement cannot be sourced quickly, or at all.

    Understanding PLC Lifecycle Status

    Both major PLC manufacturers operate structured lifecycle programmes for their hardware platforms. Allen Bradley, for example, moves products through active, active mature, and discontinued phases, with spare parts availability and technical support generally becoming more limited as a product moves through this lifecycle. Siemens operates a broadly similar structure. Understanding where each PLC platform on a production site sits within its manufacturer’s lifecycle is the foundation of any sensible obsolescence management strategy, yet many manufacturers have never conducted this kind of audit across their installed control system base.

    A PLC platform reaching discontinued status does not mean it will fail imminently, many continue running reliably for years afterward, but it does mean that when a failure eventually occurs, sourcing a genuine replacement part becomes progressively more difficult and expensive, often requiring purchase through secondary markets with less certainty around part authenticity and condition.

    The True Cost of Reactive Obsolescence Management

    Manufacturers who address PLC obsolescence reactively, only when a failure actually occurs, face a genuinely difficult position. A critical production line is down, the specific PLC module required is no longer available through normal supply channels, and the options narrow quickly to an expensive expedited sourcing effort through secondary markets, or an emergency control system replacement project undertaken under significant time pressure, with all the cost and risk that entails compared to a planned upgrade.

    This reactive scenario is where the real cost of obsolescence becomes apparent, not in the eventual cost of an upgrade itself, which is often unavoidable regardless of timing, but in the lost production, expedited freight and labour costs, and compressed decision making that comes from managing the situation as an emergency rather than a planned project.

    Building a Practical Obsolescence Management Approach

    A structured approach starts with an audit of installed PLC hardware across a facility, documenting the specific platform, model, and lifecycle status of each control system, alongside how critical each one is to production continuity. This creates a clear picture of where genuine risk sits, distinguishing a discontinued PLC controlling a critical refrigeration system from a similarly aged PLC on a less critical, non production line application.

    From this audit, a manufacturer can make informed, risk based decisions about spare parts holding, maintaining critical spare modules on site or readily accessible for the highest risk, highest consequence systems, rather than either holding excessive spares across every piece of equipment or holding none at all and relying entirely on reactive sourcing when a failure occurs.

    Planned Migration as an Alternative to Reactive Replacement

    For control systems that are approaching or have already reached discontinued status on genuinely critical production equipment, planned migration to a current platform is generally a far better outcome than waiting for a failure to force the decision. A planned migration allows adequate time for proper design, testing, and commissioning, scheduling the changeover during a planned shutdown rather than an unplanned emergency, and often allows the opportunity to improve the control logic and functionality at the same time, rather than simply replacing like for like under time pressure.

    This is a genuinely different project, both in cost and outcome, to an emergency replacement forced by an unexpected failure. Manufacturers who plan migrations proactively, informed by a clear understanding of their obsolescence risk, consistently achieve better outcomes than those managing the same eventual transition reactively.

    Balancing Spares Holding Against Capital Tied Up in Inventory

    Holding spare PLC modules for every piece of equipment on a site is rarely a sensible approach, since it ties up capital in inventory that may never be used, particularly for lower risk, non critical applications. The more practical approach is a risk weighted strategy: holding genuine critical spares for the highest consequence systems, where downtime cost clearly justifies the inventory investment, while accepting a higher tolerance for sourcing delay on less critical applications where a brief period of downtime, while not ideal, does not represent a genuine production or safety crisis.

    Working With Manufacturer End of Life Notices

    Allen Bradley and Siemens both issue formal end of life and discontinuation notices as products move through their lifecycle, typically with a defined window during which spare parts and technical support remain available before a platform moves to fully unsupported status. Manufacturers who actively track these notices for the specific hardware installed across their site gain valuable lead time to plan a response, whether that is securing critical spares before a discontinued window closes, or beginning the design process for a planned migration project. Manufacturers who do not track these notices typically only discover a platform’s status at the point of failure, when the option to plan calmly has already been lost.

    Subscribing to manufacturer notification services, or working with an engineering partner who monitors this information as part of ongoing client support, is a low cost way to ensure these notices translate into timely action rather than being missed entirely.

    Documenting Control System Configuration as a Risk Reduction Measure

    Beyond hardware obsolescence itself, a related and often underappreciated risk is the loss of accurate configuration and programme documentation over time, particularly where a system has been modified by multiple parties across its service life without consistent version control. When a PLC eventually does need replacement, whether due to failure or planned migration, having accurate, current documentation of the existing control logic, I/O configuration, and any custom modifications significantly reduces the cost, time, and risk of the replacement project. Maintaining this documentation as an ongoing discipline, rather than attempting to reconstruct it after the fact, is a genuinely valuable and often overlooked part of managing obsolescence risk.

    Making Obsolescence Management Part of Ongoing Engineering Practice

    Obsolescence management works best as an ongoing discipline rather than a one off exercise, reviewed periodically as manufacturers update their lifecycle status and as production priorities evolve. An engineering partner with genuine, ongoing familiarity with a site’s control systems, of the kind BevTech develops through long term FMCG client relationships, is well placed to flag emerging obsolescence risk before it becomes a genuine emergency, and to support both spares strategy decisions and planned migration projects when the time comes. To discuss an audit of your facility’s PLC obsolescence risk, contact BevTech at 25 Silvio St, Richlands QLD 4077, or admin@bevtech.com.au.