PLC & DCS Systems
Programmable logic and distributed control systems forming the automation backbone of custom-built panels.
About PLC & DCS Systems
A programmable logic controller (PLC) reads field inputs — switches, sensors, transmitters — runs the control program and drives outputs such as contactors, valves and drive references. A distributed control system (DCS) applies the same idea across a whole process plant, with controllers, remote I/O, operator stations and engineering tools working from one shared database.
As a PLC panel supplier in India, Microtech builds automation panels around Schneider Electric Modicon, Siemens SIMATIC, Mitsubishi Electric MELSEC and Amtech-Jetter controllers. Small machines can run on a compact logic controller; process lines with hundreds of signals move to a modular PLC with remote I/O; and plants that need a full DCS can be engineered on Siemens SIMATIC PCS 7 or PCS neo.
Panels are built at our Varanasi and Lucknow facilities from your I/O schedule and control philosophy: power supplies, controller rack, interposing relays, terminal blocks, network switches and HMI, wired and loop-checked before dispatch. Programming, SCADA links and site commissioning can be included, or we supply the hardware for your own system integrator.
Key specifications
| Controller platforms | Schneider Modicon (M221, M241, M251, M262, M340, M580); Siemens SIMATIC S7-1200 G2 and S7-1500; Mitsubishi MELSEC iQ-R, iQ-F, Q and L series; Amtech-Jetter process PLC |
|---|---|
| DCS platforms | Siemens SIMATIC PCS 7 and web-based SIMATIC PCS neo |
| Programming | IEC 61131-3 languages (ladder, function block, structured text, SFC) in the maker's tool — TIA Portal, EcoStruxure Machine Expert / Control Expert, iQ Works |
| Networks | PROFINET and OPC UA (SIMATIC), CC-Link IE TSN / Field (MELSEC), Ethernet and Modbus TCP (Modicon), Modbus RTU over RS-485 |
| High availability | Redundant CPU options such as SIMATIC S7-1500 R/H and Modicon M580 for continuous processes |
| Safety | Safety controllers on selected ranges; SIMATIC PCS neo supports certified safety functions up to SIL 3 |
| HMI / SCADA | Panel-mounted HMI of the chosen make; Mitsubishi GOT and MC Works64, Amtech JetViewSoft web-based SCADA |
| Panel construction | Controllers such as SIMATIC S7-1500 are IP20 devices for cabinet mounting; enclosure IP rating, cooling and layout set by the site |
Features & benefits
- Controller make chosen to match your plant standard or existing spares
- Scales from a compact logic controller to modular PLC with remote I/O, or a full DCS
- Interposing relays, surge protection and signal isolation between field and controller
- Network design for PROFINET, CC-Link IE, Ethernet or Modbus as the platform requires
- Clean wiring practice — ferruled cores, labelled terminals and segregated power and signal ducts
- Panel I/O and loop testing before dispatch, with FAT on request
- Programming, HMI screens and SCADA integration offered as part of the scope
Where it’s used
- Water and wastewater treatment plants
- Process plants — chemicals, pharma and food
- Sugar, paper and cement plant automation
- Packaging and special-purpose machines
- Material handling and conveyor systems
- Utility and building management integration
Standards & compliance
PLC & DCS Systems — FAQs
Which PLC brands can you build a panel on?
We build on Schneider Electric Modicon, Siemens SIMATIC, Mitsubishi Electric MELSEC and Amtech-Jetter controllers. If your plant has standardised on one make for spares and programming tools, we will design within it.
When do I need a DCS rather than a PLC?
A PLC suits machines and individual process units. A DCS makes sense when many units must run as one plant with shared operator stations, alarm management, batch control and a single engineering database. For mid-sized plants a PLC with SCADA is often enough; we can review the signal count and process before you decide.
Do you also do the PLC programming?
Programming, HMI screens and SCADA links can be included in our scope. Alternatively we supply a fully wired, tested panel to your own system integrator, with drawings and I/O lists for their work.
What do you need from us to quote a PLC panel?
An I/O list (digital and analogue counts), the preferred controller make, communication needs, the HMI or SCADA requirement and the site conditions for the enclosure. A process description or P&ID helps us size spare capacity correctly.
