Apex Control Engineering

⏱️ Timers for Minutes & Hours in Process Automation
In process automation, we often need PLC timers to count minutes or even hours
(for soaking time, delays, batching, heating, drying, etc.).
However, some PLCs have timer limitations:
Mitsubishi & Xinje PLCs → maximum timer base 100 ms
Haiwell PLCs → maximum timer base 1 second
So we cannot directly set long time values using a single timer.
✅ Practical and reliable solution
Use a 1-second timer together with a data register.
Logic concept:
Run a 1-second timer
When the timer is DONE, ADD 1 to a data register (time counter)
Reset the same timer
Repeat the cycle to build minutes / hours
This approach is:
Simple and stable
Easy to understand
Easy to troubleshoot
Applicable to many PLC brands
📌 Sample ladder program is attached,
implemented using Haiwell PLC (Happy software) to demonstrate the concept clearly.

We successfully designed and commissioned the Control Panel for the STP (Sewage Treatment Plant) at Hemas Hospital, Thalawathugoda, one of Sri Lanka’s well-recognized private hospitals.

💡 Equipment used:

PLC: Schneider M221CE40

HMI: Xinje Touchwin TG765

This project included full automation of the STP, ensuring smooth and reliable operation.

If you have any automation requirements – PLC programming, HMI integration, pump & water system automation, VFD control, or troubleshooting of existing systems – we can help you.

📱 077 44 31 830

Let’s bring efficient and reliable automation to your factory or facility!

Apex Control Engineering
Industrial Automation | PLC | HMI | VFD

We provide reliable PLC-based automation solutions for industrial and commercial applications.

🔧 Our expertise includes:
✔ PLC programming & commissioning
✔ HMI & VFD integration
✔ Pump & water system automation
✔ RO plant & process control
✔ Modification & troubleshooting of existing systems

💡 Experience with leading PLC brands:
Xinje | Mitsubishi | Haiwell | Schneider | Siemens

We focus on practical, cost-effective, and reliable automation solutions tailored to your process needs.

📞 Contact: Akalanka Dharmadasa
📱 077 44 31 830

📍 Serving factories, plants, and projects across Sri Lanka