Equipment Startup Support in Thailand — The 3-Part Handover Set

Most plants only start looking for equipment startup support after the machine has already cleared the port. Yet when commissioning runs late, the machine itself is rarely the reason. What actually stalls the schedule is a single gap — the control handover information is incomplete. The drawings are out of date, the PLC source has no comments, and nobody can find a backup of the parameters. This article explains how to take stock of that information, shows with a model calculation how far the cost moves depending on how prepared you are, and lists the questions worth asking before you compare a single quotation.

What are you actually buying when you buy equipment startup support

The phrase “equipment startup support” is used with surprising looseness once contracts are on the table. When a plant manager says “please handle the startup,” what he pictures is everything up to the point where the line makes good parts. What the vendor pricing the job usually pictures is “whatever we are called in for, after the machine is bolted down.” That gap in understanding is what later produces both extra cost and schedule slip.

Start by breaking the word apart. Getting a machine from crate to production runs through roughly five stages — shipping and customs clearance, moving in and mechanical installation, utility connection (power, compressed air, cooling water, exhaust), restoration and tuning of the control system, and finally the build-up of production conditions and the transition to volume output. The work people call equipment startup support is concentrated in the fourth and fifth stages. Stages one to three are physical work — you can see it, so it can be quantified and quoted. The problem is that the invisible fourth and fifth stages consume most of the calendar.

Installation work and startup support are two different contracts

Installation is a job defined by dimensions, weight and counts. How many foundation anchors go in, how tightly the machine is levelled, how many metres of piping are run. Look at the layout drawing and the quantities are fixed, the quotation is reasonably accurate, and the duration is predictable.

Startup support does not behave that way. The volume of work is determined by how much information about the equipment still exists. For the identical machine of the identical model, having a commented PLC project file in hand versus reading the logic off the ladder monitor on the shop floor can change the engineer-days required several times over. So if you receive a startup quotation with the same instincts you bring to an installation quotation — a single lump sum for the whole package — one of the two parties is set up to lose money.

Treating these as separate contracts has a practical purpose. Installation is what local construction contractors are good at, while startup is the work of engineers who understand control systems. In Thailand, projects regularly stall in the state of “the machine is installed, but there is nobody who can open the control cabinet” because both scopes were handed to one contractor. Conversely, appointing the startup partner early means the perspective of “the person who will have to work on this later” is present from the installation stage, which makes details like cabinet orientation, spare cable length in the duct, and maintenance access space far more realistic.

What stalls is not the machine but the control handover information

Follow enough relocation projects from a Japanese parent plant and the reason for delay lands in roughly the same place every time. It is not that the machine is broken and will not run. The machine runs — but there is neither a person nor a document that can explain why it behaves the way it does.

In practice it goes like this. The equipment comes up and runs fine in dry cycle. Then you put real product through it, and under one particular condition an alarm fires and the line stops. Trace the ladder and you find an interlock that was added in Japan some years ago. The person who knows why it was added no longer works at the plant. It was never reflected in the drawings. It might be safety-related, so you cannot simply remove it. Somewhere between several days and several weeks disappears here.

These cases share one trait. The longer a machine has been in service, the wider the gap between the drawings and the real hardware. For equipment that has run five years, the gap is small. Equipment that has run fifteen years has been through repeated changeover improvements, safety countermeasures and part substitutions forced by obsolescence — and it is close to unheard of for all of that to have been fed back into the drawings. The equipment selected for relocation or renewal is almost always the latter kind.

So when you are deciding whether to engage equipment startup support, the first thing to check is not the vendor’s rate card. It is what your own organisation still has on file.

The three-part handover set

The stocktake comes down to three items. Whether or not you have all three very nearly determines how difficult the startup will be. It is worth contacting the Japanese parent plant to confirm them the moment relocation is first discussed, because once the equipment is on a ship, the people who can answer become a lot harder to reach.

1 The PLC project file (source with comments)

This is the most important item and the one most often lost. A project file here does not mean a binary simply uploaded out of the PLC. It means the format you can open in the engineering software, containing device comments, labels, network configuration and parameter settings.

Upload from the live controller and you will get a program that runs. But it is not at all unusual for the uploaded data to contain no comments — depending on the model and the save settings, comments may live only on the engineering PC and never in the PLC itself. Ladder without comments becomes thousands of steps of bare alphanumeric device addresses. It is not unreadable, but the time needed to understand it changes by an order of magnitude.

There are three things to verify. Does the file exist. Is it the revision that includes the last modification. And does your company hold a licence for the engineering software that can open it. The third is the one most often overlooked. The situation where the file exists but only the Japanese machine builder owns software able to open it is genuinely common.

2 The latest electrical drawings (with modifications reflected)

There is a wide gulf between “we have the drawings” and “we have the current drawings.” The most frequent pattern is that the as-delivered drawing set has been carefully filed, while later control system modifications were never recorded — not even as a red-pen markup.

When you receive a drawing set, the first useful test is to compare it against a single photograph of the inside of the cabinet. Count the terminal block rows, the breakers, the interposing relays and modules that have been added. If the counts do not match, the drawing is not current. This check takes thirty minutes and is accurate enough to act on.

Worth checking alongside it is the construction of the cabinet itself. How control panels should be designed and built is covered separately in criteria for ordering control panel design and manufacturing in Thailand, but where the destination site has different supply conditions or standards, you may need to decide to rebuild part of the panel. Without current drawings you cannot even make that decision.

3 Backups of parameters and recipes

The third item is neither software nor drawings. It is a collection of settings — servo amplifier gains, inverter parameters, temperature controller settings, HMI screen data, and the recipes for each product. Because these are rewritten by day-to-day adjustment, they never appear in the as-delivered documentation.

The awkward part is that they often depend on battery backup or a memory card. You shut the equipment down, ship it, and power it up again several weeks or several months later. If the battery dies in between, the settings are gone. If no backup was taken before the move, there is nothing to restore from.

Worth noting here is the supply situation of the storage media themselves. The MELSEC programmable controller update information page on the Mitsubishi Electric FA site carries a discontinuation notice posted on 24 July 2026 covering SD memory cards, CF cards, CFast cards and memory card adapters. It is entirely possible to reach the point of taking a backup and find the matching card can no longer be sourced. Actual last-order and repair-support dates differ from notice to notice, so for the models used in your own plant you need to confirm them directly against the manufacturer’s announcements.

Recording the state of the three-part set in a form like the following makes it easy to share internally.

The more blanks you leave when you fill this table in, the further down the patterns in the next section your project will sit. Put the other way round, the act of filling in those blanks is the highest-return preparation available to you.

How far startup cost moves with your level of preparation (model calculation)

From here the discussion moves to money. Everything below is a model calculation, not an average of measured results. Read it as a framework to be recalculated with your own numbers.

The model case is “relocating one machining and assembly line, consisting of 4 machines, from a Japanese parent plant to a Thai factory.” The assumptions are as follows.

Of these assumptions, the one that matters most to the decision is the third row. Every day the startup slips, 54,000 baht of gross profit is lost on top of whatever the support costs. Set against the 12,000 baht engineer-day rate, one day of delay is equivalent to 4.5 local engineer-days. That ratio is exactly why designing to come up one day earlier pays better than negotiating a few tens of thousands of baht off the quotation. Local labour costs are also trending upward — according to a JETRO business brief, the minimum wage in Bangkok has been raised to 400 baht per day, effective 1 July 2025. Engineering rates move in the same direction over the long run.

Next, look at how the presence or absence of information drives engineer-days. Assume the following control analysis effort per machine.

• Drawings and commented source available → 3 engineer-days = 36,000 baht
• Neither available, logic traced from the live ladder monitor → 15 engineer-days = 180,000 baht

The difference is 144,000 baht per machine. Across 4 machines that is 576,000 baht. And that is the analysis difference alone — on top of it sits the lost gross profit created by the difference in startup duration.

The table below puts those totals side by side across five patterns. Support cost is engineer-days × 12,000 baht, and lost gross profit is startup days × 54,000 baht.

The column to read in this table is not the support cost. It is the total. Look only at support cost and pattern E, at 252,000 baht, is more expensive than pattern A at 144,000 baht. Lay the quotations side by side and pick the cheapest, and E never gets selected.

Here is how E breaks down. Before the move, 5 engineer-days = 60,000 baht are spent surveying the equipment in Japan to confirm what exists in the three-part set and where the hardware differs from the documentation. On that basis, startup itself takes 16 engineer-days = 192,000 baht. Together, 252,000 baht. Paying for those 5 engineer-days up front compresses the startup to 12 days and holds lost gross profit to 648,000 baht. The total comes out at 900,000 baht, below pattern A.

State the gaps explicitly. The difference between E and C is 2,250,000 baht, and the difference between E and D is 3,960,000 baht. Meanwhile E’s support cost is only 108,000 baht higher than pattern A, where the three-part set was already complete. In other words, the price of “finding out first” is a little over one hundred thousand baht even measured against the best-case scenario, while the total gap against the information-poor patterns C and D runs into the millions. That is the single point this article most wants to make.

The reason D swings so far beyond C is not only engineer-days. When the PLC itself is a discontinued product, you commission on the assumption that replacement parts will not be available if something fails, and procurement waits and alternative-part evaluation get pushed into the schedule. In that situation it can genuinely be faster to consider renewal at the same time as startup. The next section deals with that.

Note that this calculation excludes dispatch of an engineer from Japan (45,000 baht per engineer-day plus 60,000 baht for travel and accommodation). If you include it, dispatch is mainly needed for patterns C and D — to compensate for missing documentation with the memory of an engineer who was there at the time. Add 5 dispatch engineer-days to pattern C and you add 225,000 baht plus 60,000 baht of travel and accommodation, for 285,000 baht. With the information in hand, that cost never arises in the first place.

When legacy equipment renewal and PLC replacement arrive together

Once relocation or restart is on the agenda, the question “shall we modernise the controls while we are at it” comes up with high probability. The deciding factor is whether the controller sits on a discontinuation notice.

The MELSEC update information page from Mitsubishi Electric lists discontinuation notices together with their posting dates. In order of posting date, there is a notice dated 5 June 2026 for CC-Link IE compatible intelligent hubs, one dated 11 June 2026 for the MELSEC-F FX3U and FX3UC series and certain extension devices, one dated 15 July 2026 for the MELSEC-L series, one dated 24 July 2026 for SD memory cards, CF cards, CFast cards and memory card adapters, and one dated 31 July 2026 for compact-type remote I/O units in the CC-Link system. The caution here is that the posting date is the day the notice appeared — it is not the last-order date and not the end of repair support. Actual dates differ by item, so for the specific model numbers used in your equipment, check the manufacturer’s announcements directly.

If items under notice do turn out to be in your equipment, there are three options.

The most common misunderstanding across these three is the belief that “with a full replacement, missing information does not matter.” The truth is the opposite. To move onto a new PLC you must understand completely what the old PLC was doing. Fully replacing the controls of a machine with no source and no comments is the same job as rewriting software from scratch with no specification. In other words, a missing three-part set is equally expensive whether you keep the system as-is or replace it.

Machine tool retrofit follows the same logic. A machine tool whose mechanics are sound and whose accuracy still holds can be brought back to something close to new condition for practical purposes by renewing only the controls. But retrofit effort is only predictable when the axis configuration, ball screws, scales and motor specifications can be pinned down. Start from a state where the nameplate is illegible or the motor model cannot be identified, and an investigation stage has to come first — which puts you close to pattern C or D in the table above.

Where renewal involves control system modification, the treatment of the existing program swings the effort dramatically. Do you port it, or extract the specification and rewrite it. That call cannot be made without looking at the condition of the program. How to think about it when the work goes to an outside partner is covered in what to look for when outsourcing PLC program development.

One more thing people want to fold into a renewal is data collection. The moment you are touching the controls is by far the most convenient time to create take-off points for machine status signals and production counts. However, running that in parallel with the startup itself makes fault isolation difficult. It is safer to stabilise production first and add data collection in stages, an approach covered separately in a realistic way to add IoT to existing equipment.

Issues that only appear when you commission in Thailand

Everything so far has been about the equipment. Commission it in Thailand and regulation and local conditions are layered on top. As JETRO’s regional analysis report points out, Thai manufacturing is being pushed toward higher value-added operations as trade and investment structures shift, so equipment turnover and process reorganisation will continue. The regulatory side moves quickly too.

BOI, used machinery and the performance certificate

BOI investment incentives have been updated repeatedly in recent years. The BOI announcements page carries, among others, an announcement dated 21 May 2026, No. 9/2569, covering incentives related to Smart and Sustainable Industry, and an announcement dated 15 July 2026, No. Sor.3/2569, revising the list of eligible business activities. According to the Alvarez & Marsal commentary, the BOI announced a new package of investment incentives on 15 January 2026, and production-base relocation projects commonly come up to speed within 12 to 18 months.

The treatment of used machinery is unavoidable in a relocation project. Emerhub’s commentary explains that in the electronics and semiconductor sector, good-quality used machinery “manufactured within the past 10 years” may be counted toward the investment amount. That is a condition tied to a specific sector and measure, however, and should not be taken as a general rule across all industries. The reliable route is to confirm with the BOI directly which conditions apply to your own application category. Application deadlines also vary by measure — stimulus-oriented measures run to the end of 2026, while measures covering retention and expansion run to the final business day of 2027.

The practical point to hold on to is that bringing in used machinery calls for a machinery performance certificate and a physical trial-run inspection. This connects directly to the startup plan. To certify performance, you have to demonstrate that the equipment operates to specification — and equipment whose control system has not been restored cannot be presented for that inspection. A gap in handover information is therefore not only a technical problem, it is a problem for your application schedule.

Working out the machine’s year of manufacture, whether a certificate can be obtained, and the conditions the inspection requires at the planning stage is what makes the schedule from customs clearance to installation realistic.

Where projects actually stall — customs, installation and power

Outside the regulatory sphere, the places where things stall are equally predictable.

First, mismatches between the customs documentation and the physical machine. A model designation on the packing list that differs from the nameplate, accessories packed separately so the counts do not agree — minor discrepancies like these hold shipments at customs for days or weeks. Most of them can be prevented simply by reconciling photographs against the list before the move.

Second, power supply and frequency. Bring Japanese equipment into Thailand and the voltage, phase count and frequency conditions all change. Sometimes a transformer settles it; sometimes inverter and motor selection has to be revisited. This cannot be judged without current drawings.

Third, the move-in route and installation conditions. Machine height against building beams, floor load capacity, whether anchors can be drilled at all. Whether the machine can be brought in without stopping the existing line. These can only be confirmed once the building drawings and the machine outline drawings are both to hand.

Fourth, utility capacity. Do the compressed air, cooling water and exhaust systems each have headroom for the additional equipment. In a plant running its existing lines at the limit, pressure on the existing side can drop the instant the new machine starts.

Fifth, local staffing. A startup period needs more people than normal operation — operator training, handover to the maintenance team, an escalation path for emergencies. Without that arrangement in place, the line stops the week after the startup support team leaves.

For all five, the options narrow sharply once the equipment has arrived. Put the other way round, every one of them can be eliminated at the planning stage at essentially no cost.

Six questions that identify the right partner

Here are six questions worth asking before you compare quotations. Comparing prices can wait until you have all six answers.

Question 1 “If there is no PLC source and no drawings, how will you proceed”

A good answer produces a concrete sequence. Upload from the controller, rebuild the I/O list by physically checking each point, observe and document the operating sequence — each stage named, each with an effort estimate. A worrying answer stops at “we cannot say until we have seen it,” or swings the other way and replies instantly with “no problem, we can do that quickly.” Equipment without documentation genuinely is hard to estimate, so the differentiator is whether the vendor can describe a method that assumes that uncertainty.

Question 2 “Can we order the preliminary survey on its own”

A good answer is that they can quote for the survey alone and can describe its deliverables — an inventory of what exists, a list of what is missing, and a range for the expected effort. The reason pattern E worked in the model calculation is precisely that this stage can be bought independently. A worrying answer is that they will only take the work bundled with a full startup contract. In that case the buyer has to commit a substantial sum while still lacking information.

Question 3 “What happens when the effort exceeds the estimate”

A good answer is clear about how a ceiling is set, what the approval process is when it is exceeded, and how often progress is reported. A worrying answer offers time-and-materials billing with no mention of a cap — or, conversely, quotes a fixed price despite the information being incomplete. The latter looks safe but tends to mean either that the risk premium was baked in from the start, or that changes will be billed later as scope variations.

Question 4 “What are the acceptance criteria for startup completion”

A good answer states the criteria numerically — continuous running time, yield rate, cycle time, the number of product variants covered. A worrying answer is “it is finished when it runs.” When that definition is vague, the handling of faults that surface after support ends becomes a dispute.

Question 5 “Which documents do we receive at handover”

A good answer lists the deliverables from the outset — the updated PLC project file, revised electrical drawings, parameter backups, a record of changes, and operating and maintenance procedures. A worrying answer tries to settle handover verbally. What you receive here becomes the three-part set for your next renewal or line expansion.

Question 6 “Who handles maintenance after startup”

A good answer describes a concrete arrangement for people on site or able to arrive quickly — where the engineers are based, response hours, and whether they can work in Japanese, Thai or English. A worrying answer assumes support by business trip from Japan only. Because most faults appear in the first few weeks after the move to volume production, the ability to be on the floor during that window is what actually separates vendors.

Ask all six and the reason behind price differences usually becomes visible. Cheap quotations tend to be thin on the answers to questions 1 and 3, and that is exactly where the money comes back as variations after the contract is signed.

What to check on every quotation

When a quotation arrives, work down the following items and confirm each is stated explicitly. Anything not written down becomes a negotiation later.

Of everything in this table, the item that pays off over the long term is the list of deliverables. If the documentation created during this startup stays with you, your next line expansion or renewal begins with the three-part set complete — in other words, from pattern A or E of the calculation. Skip it, and a few years from now you pay the same investigation cost all over again.

Frequently asked questions

What does equipment startup support actually cover

It refers to the engineering support that takes an installed machine to the point where it can genuinely run product. Concretely, that means restoring and verifying the control system, checking I/O continuity, tuning the sequence, validating safety circuits, building up production conditions, and handing over to operators and the maintenance team. In practice it is treated as a separate contract from installation work such as foundations, piping and wiring. How far the scope reaches varies between companies, so lay the stages out and confirm them at the quotation stage.

How much does equipment startup support cost

It varies greatly with how complete the information is, so a rate alone does not determine it. In the model calculation in this article, for one line of 4 machines, support cost is 144,000 baht when the three-part set is complete and 720,000 baht when the PLC source is missing. Including lost gross profit, the totals are 954,000 baht against 3,150,000 baht. These are model figures rather than measured results, but the pattern — that the spread in cost is driven by the presence of information rather than by unit rates — holds in real projects as well.

Can equipment be commissioned with no PLC source and no drawings

Commissioning it is certainly possible. You upload the program from the controller, rebuild the I/O list by measuring each point, then observe operation and document the sequence. The effort, however, multiplies several times over and the schedule stretches. Pattern C in this article’s calculation is exactly this case, allowing 60 engineer-days of analysis and support and 45 days of startup. The real question is less whether it is possible and more whether that effort and that schedule are acceptable to you.

Should legacy equipment renewal and PLC replacement be done at the same time

If the controller appears on a discontinuation notice, it is worth considering them together, because a failure after startup with no parts available turns into a long stoppage. That said, full replacement assumes you can understand the old program completely. For equipment with neither source nor comments, replacement can end up consuming more effort than keeping the system. Checking the state of the three-part set before deciding is the realistic order of operations.

Can control system modification be handled by a local company

There are companies in Thailand able to do this work. The criteria are three — whether they have engineers on the ground who understand control systems, whether they can respond quickly to a call-out after startup, and whether they leave the work behind in the form of drawings and documentation. Because trouble is concentrated immediately after startup, distance and response speed matter as much as technical quality. Splitting roles between the Japanese machine builder and a local company is also a common approach in practice.

Summary

When you are considering equipment startup support, the first thing to do is not to collect competing quotations but to take stock of the information you already hold. Commented PLC source, electrical drawings with modifications reflected, and backups of parameters and recipes. Whether or not you have those three changes both cost and schedule substantially. In this article’s model calculation, the gap between pattern E, which added a 5 engineer-day preliminary survey before the move, and pattern C, which proceeded without source, was 2,250,000 baht, and the gap against pattern D, where the PLC was also discontinued, was 3,960,000 baht. It is equally rational to choose your support partner not on the rate card but on whether they can describe, as a procedure, how they will close the gap when the information is not there. And if you take the documentation created during startup as a contractual deliverable, your next renewal or expansion starts from a far stronger position.

TOMAS TECH works with Japanese-owned factories in Thailand on equipment startup support, control system modification, and renewal projects covering legacy equipment and PLC replacement. It is entirely fine to get in touch while relocation or renewal is still at the planning stage and you do not yet know what documentation exists. We are happy to discuss taking stock of the three-part set, or carving out the preliminary survey as a standalone piece of work — please tell us where you stand via our contact page.

References

• Mitsubishi Electric FA site — MELSEC programmable controller update information
• Thailand Board of Investment (BOI) — announcements page
• Emerhub “Thailand’s Renewed BOI Incentives for 2026 & 2027”
• Alvarez & Marsal “Thailand’s Renewed BOI Incentives (2026–2027)”
• JETRO Business Brief — Bangkok minimum wage raised to 400 baht per day (Thailand)
• JETRO Regional Analysis Report — Thailand (1) A shifting trade and investment structure and the drive to upgrade manufacturing