Modbus RTU vs TCP: How Each Works, When to Use Which, and How to Avoid Common Field Faults
Modbus RTU vs TCP explained: registers, function codes, RS-485 wiring, Unit IDs, gateways and security, with a practical checklist for reliable field data.
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SCADA and HMI software turns field data from PLCs and RTUs into process mimics, trend charts and alarm lists, so you can monitor and control a site from the control room. We build custom web-based or desktop SCADA that connects to Siemens, Allen-Bradley, Mitsubishi and Schneider PLCs. You own the source code, and there are no additional licence fees.
Whether it is a pumping station, a treatment plant or a production line, the symptoms are the same: operators walk out to the field to read a value, alarms are noticed too late, and PLCs from different vendors each sit behind their own screen. Commercial SCADA platforms solve this, but every extra client and every larger tag count means another licence.
We build web-based or desktop SCADA and HMI software tailored to your process. Signals from PLCs and RTUs are brought together on one screen as process mimics, trend charts and an alarm list. Operators monitor and control field equipment from the control room, and historical data is stored ready for reporting. It works alongside our remote monitoring platform for dispersed sites and our energy monitoring system for line and machine-level consumption.
We connect to Siemens, Allen-Bradley, Mitsubishi, Schneider and other PLCs over Modbus, OPC-UA, Profibus and Ethernet, writing drivers or adapting existing protocols where needed.
Mimic diagrams, trend charts and gauges that mirror your actual process, so operators understand the situation at a glance. Runs on touch panels, tablets and desktops.
Alarms are raised for limit breaches, equipment faults and process deviations, and sent by email, SMS or push notification. Who acknowledged each alarm, and when, is recorded.
All sensor data is stored in a time-series database. Pull trends for any period, compare shifts and generate reports.
Separate access levels for operators, technicians and managers. Critical control commands can require dual approval, and every user action is logged.
Secure access from outside the site over VPN. Critical alarms arrive as mobile notifications, and field teams can open mimics and live values on a tablet.
We review your existing PLCs and RTUs, field network and protocols, and draw up the list of data points (tags) with you.
We design HMI screens and mimics that follow your process flow, and define alarm levels and scaling parameters.
We build the software, connect it to your PLCs and test it, then bring the historian and reporting modules online.
We test the system on site and confirm it runs reliably, then train operators and technicians and hand over the documentation.
On commercial platforms such as iFIX, WinCC or Ignition, licence costs grow with the number of clients and tags. We build the functions you need specifically for your organisation: you own the source code, pay no additional licence fees and are not tied to a single vendor. To carry field data from SCADA into production tracking, we combine it with MES production management in a single data flow.
SCADA (supervisory control and data acquisition) collects field data from PLCs and RTUs and turns it into process mimics, trend charts and alarm lists. The HMI is the screen where operators see that data and control equipment. Together they let operators monitor and run a site from the control room instead of walking out to the field to read a value.
We connect to Siemens, Allen-Bradley, Mitsubishi, Schneider and other PLCs over Modbus, OPC-UA, Profibus and Ethernet. Where needed, we write a driver or adapt the existing protocol. Instead of PLCs from different vendors sitting behind their own screens, they appear together on one screen, in the same process mimic and alarm list.
On commercial platforms such as iFIX, WinCC or Ignition, licence costs grow with the number of clients and tags. With custom SCADA we build the functions you need for you: you own the source code, pay no additional licence fees and are not tied to a single vendor. The system can be built as web-based or desktop software.
Yes. Off-site access runs over a secure VPN connection. Critical alarms arrive as mobile notifications, and field teams can reach process mimics and live values from a tablet. Separate permission levels are set for operators, technicians and managers, critical control commands can require dual approval, and every user action is logged.
We first review your PLCs and RTUs, site network and protocols, and agree the list of data points (the tag list) with you. We then design HMI screens around the process flow and define alarm levels, develop the software, connect it to the PLCs and test it. Finally, we commission the system on site, train operators and technicians, and hand over the documentation.
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