PLC vs DCS: Η Αιώνια Μάχη
Δύο φιλοσοφίες ελέγχου που συγκρούονται αλλά και αλληλοσυμπληρώνονται. PLC για γρήγορο, διακριτό έλεγχο – DCS για κατανεμημένη διαχείριση διεργασιών.
Get to know me

I am an IT Specialist based in Greece with strong expertise in computer systems, networking, and automation. I have successfully completed professional training and certifications in Computer Systems Support, Intranet/Internet Services, and Industrial Automation. Over the years, I have been providing IT support, building secure network infrastructures, and implementing automation solutions that improve efficiency and reliability.My focus is on delivering practical, robust, and future-ready IT services that meet the evolving needs of modern businesses.
George Kollias
35
Athens, GR
Services i offer to my clients
Expert in managing Windows & Linux systems, ensuring security, stability, and performance.
Skilled in LAN/WAN, VLANs, VPNs, and firewall configuration for secure infrastructures.
Providing end-user support, troubleshooting, and technical assistance with precision and speed.
Experience with Azure, VMware, and virtualization solutions for scalable IT environments.
Background in Industrial Automation and scripting for efficiency and reliability.
Skilled in deploying VMware environments, ensuring high availability and scalability for IT infrastructures.
What my employers think about me
Check out my Resume
Completed a diploma in Industrial Automation, gaining expertise in control systems, automation technologies, and applied electronics.
Specialized in computer systems support, covering installation, troubleshooting, and IT service management.
Certified in managing intranet/internet systems and services, focusing on network infrastructure and web technologies.
Provided IT support in the security & automation industry, ensuring smooth operation of systems and user environments.
Delivered end-user and infrastructure support, solving complex IT issues and maintaining high service quality under pressure.
Designed and developed a custom ERP platform, integrating logistics, material management, and automation beyond standard SAP features.
My level of knowledge in key areas
This project implements automated control of a 10-meter tank using a Siemens PLC CPU integrated with the Fernhill SCADA system. A Senix ToughSonic ultrasonic sensor provides a 0–10 V analog signal to the PLC, enabling continuous level monitoring and data logging over Ethernet (S7 TCP/IP).
The control logic is straightforward: when the tank reaches 10 m, the PLC opens a solenoid valve; at 5 m the valve closes. The SCADA interface allows setpoint adjustment, manual overrides, and safety interlocks. A recirculation pump can start automatically or manually for mixing. Remote monitoring via the Fernhill SCADA mobile app provides real-time data, alarms, and control from a smartphone.
Showcasing some of my best work
Check out my latest blog posts
11 Dec, 23
Δύο φιλοσοφίες ελέγχου που συγκρούονται αλλά και αλληλοσυμπληρώνονται. PLC για γρήγορο, διακριτό έλεγχο – DCS για κατανεμημένη διαχείριση διεργασιών.
12 Jan, 24
Ο ρόλος των βιομηχανικών αυτοματισμών, IoT και AI στη βιώσιμη παραγωγή. Digital twins, ενεργειακή διαχείριση και κυκλική οικονομία.
4 Feb, 24
IoT και PLC φέρνουν νέα επίπεδα αυτοματισμού αλλά και κυβερνο-απειλές. Μέτρα ασφάλειας, Zero Trust, IEC 62443 και φυσική προστασία.
11 Mar, 24
Multi-master replication, replication topology και time sync με PDC Emulator. Για αξιόπιστο και ανθεκτικό Active Directory περιβάλλον.
15 Apr, 24
Modbus: απλότητα, SCADA/BMS. CANbus: peer-to-peer, real-time, ανθεκτικότητα. Δύο πρωτόκολλα με διαφορετικές αρχιτεκτονικές και εφαρμογές.
8 May, 24
Το προσωπικό lab είναι το ασφαλές πεδίο μάχης. Εκεί δοκιμάζονται VLANs, firewalls, backups και σενάρια αποτυχίας πριν φτάσουν στον οργανισμό. Απόδειξη και εμπιστοσύνη αντί για πειραματισμό στην παραγωγή.
Feel free to contact me anytimes
Always available for freelance work if the right project comes along, Feel free to contact me!