E.S. Service & Supply
Services

PLC programming & SCADA systems for factories

Automation built around your actual production process makes machines more precise, gives you real-time visibility, and reduces energy use.

PLC programming & SCADA systems for factories

We develop PLC programs and SCADA systems tailored to each client's production process, from motor control and machine sequencing to a single overview screen for the whole system.

Beyond control, we advise on energy saving. We analyse power usage and design automation, such as VFD speed control for motors, that sustainably lowers a factory's electricity costs.

A good control system is not judged by how clever the program is, but by whether the people running the plant understand it and can solve small problems themselves. A clear sequence of operation, meaningful variable names and a readable HMI screen dramatically reduce the number of callouts for minor issues.

In many plants, upgrading controls is also where energy savings start. Once the system records how machines actually run, it becomes obvious which ones idle for long periods and which motors run at full speed unnecessarily — exactly where VFD panels and sequence changes pay back fastest.

Automation work we do

  • PLC programs
  • SCADA systems
  • HMI screens
  • PLC control panels
  • VFD energy saving
  • Upgrading legacy controls

We serve plants in Saraburi, Ayutthaya, Pathum Thani, Bangkok, Samut Prakan, Chonburi and Rayong. See our service areas

What we do

PLC & SCADA Programming

PLC programming

Sequence design and control programs built around your real production process.

SCADA / HMI

Real-time machine status displays and remote control.

Complete PLC panels

PLC panels designed, built and wired to your machines.

VFD motor control

Motor speed matched to demand, cutting energy consumption.

Energy-saving consultancy

Power usage analysis and practical ways to reduce your electricity bill.

Commissioning & training

On-site testing and hand-over training for your team.

Worth knowing

Signs your control system needs an upgrade

Machines controlled entirely by relays

Every recipe or sequence change means rewiring — slow and easy to get wrong.

Obsolete PLC or HMI hardware

With no spares available, a single failure can stop the line for a long time.

Production data recorded by hand

Handwritten records are usually incomplete and hard to analyse afterwards.

No alarm when a machine stops

Time is lost before anyone notices, especially on night shifts or in remote areas.

Motors running at full speed all the time

Pump and fan systems that do not need full output usually save significant energy with a VFD panel.

A broken or confusing HMI screen

When operators cannot read the screen, every small problem becomes a callout.

Getting a quote

What to prepare before requesting a controls quotation

  • Make and model of your existing PLC, HMI or inverters
  • The existing program and control drawings, if available
  • The machine sequence of operation you need
  • Approximate number of input and output signals (I/O)
  • The data you want logged or displayed on screen
  • When the machine can be stopped for testing

Request a Quote

How we work

A clear process, from site survey to handover

  1. 01

    Consultation & site survey

    We review your requirements, electrical loads, installation space and existing systems.

  2. 02

    Engineering & quotation

    Our engineers prepare the single-line diagram, select the right components and give you a clear quotation.

  3. 03

    Fabrication & assembly

    Panels are built in our own workshop by experienced technicians, to the approved design.

  4. 04

    Testing before delivery

    Every panel is inspected and function-tested before it leaves our workshop.

  5. 05

    Installation & support

    On-site installation, commissioning, handover and ongoing technical support.

Projects

Real work from real sites

View all projects

FAQ

Frequently asked questions

Can you modify an existing PLC program?

Yes. An engineer reviews the existing program and system first, then proposes improvements that fit your current process.

What does SCADA do for a factory?

It shows machine status and production data in real time, lets you control equipment from a control room, and helps you spot problems faster.

How does automation reduce electricity costs?

For example, VFDs let pumps and fans run only as fast as needed, and controls can make sure machines run only when required. Actual savings depend on how each plant operates.

Which PLC brands do you work with?

Send us the make and model your plant uses together with the project details. Our team will assess it and confirm whether we can take the work before quoting.

Do you hand over the program and documentation?

Handover terms for the program, drawings and manuals are agreed at quotation stage. Tell us your plant's requirements early so they can be written into the scope.

Do VFD panels really save energy?

Clearly, on pump and fan applications that do not need full output continuously. On constant-torque loads the saving is much smaller, so assessing the actual load profile matters. Our VFD article explains the basic calculation.

Planning an electrical or control panel project?

Send us your drawings or project details. Our engineers will review them and come back with recommendations and a quotation.

LINE @esconnectFacebookInstagramTikTokYouTube081-946-7166