PLC Repair & Service

When a PLC fails, your entire automation system stops. Machines wont start, sensors stop responding, and production downtime increases quickly.

At Epoch Technical, as an ISO 9001:2015 certified company, we specialize in PLC Repair at component level. Instead of replacing complete PLC modules, we diagnose and repair the failed section of the board saving cost, reducing downtime, and avoiding long lead times for new parts.

We repair the module you already have not force a replacement.

Why Choose Epoch Technical for PLC Repair

PLC Repair performed in-house in a static-protected electronics lab
Component-level troubleshooting (ICs, relays, optocouplers, drivers, MOSFETs)
Reverse engineering capability for obsolete PLC series
Transparent pricing and zero hidden repair decisions

We fix what failed, not what is easy to replace.

What We Repair

We repair all types of PLC systems, including:

Compact PLC units
Modular / rack-based PLC systems
Safety PLCs used in industrial processes

We repair modules such as:

CPU / Main controller modules
Input / Output (I/O) cards
Communication modules (Ethernet/IP, Profinet, Profibus, Modbus, RS-485)
Power supply modules
Backplane / bus communication boards

If your PLC isnt reading I/O signals, communicating with SCADA/HMI, or the CPU is faulting we repair it.

How PLC Systems Work

A PLC continuously:

1. Reads input signals from sensors
2. Executes logic (Ladder Logic, Function Blocks, Structured Text)
3. Activates outputs to drives, actuators, relays, etc.

PLCs communicate with:

HMI / SCADA systems
Servo drives, VFDs and motion controllers
Remote I/O and field devices (Ethernet/IP, Profinet, Profibus, Modbus)

When a PLC module fails the automation process becomes unresponsive.

Our PLC Repair restores logic execution, I/O response, and communication.

Common PLC Issues We Fix

You might be facing one of these:

PLC not powering on
CPU fault light or watchdog timeout
Inputs not detecting field signals
Outputs not triggering actuators
Ethernet / Profibus / Modbus communication failure
Loss of program or firmware corruption
Unstable module behavior (random reboot / freeze)

We diagnose failures down to the circuit level:
power section, PCB trace damage, driver IC failure, optocoupler damage, or burnt components.

Our PLC Repair Process

Fault Evaluation

You send the PLC or share the issue details. We inspect and diagnose.

Clear Quotation

We explain the cause of failure and cost. No repair happens without approval.

Component-Level PLC Repair

We repair the board, ICs, power stages, and communication circuits not just swap boards.

Functional Testing

We simulate I/O response, CPU execution, and communication behavior.

Ready to Install

PLC is returned fully tested and ready to operate.

Brands We Support

We provide PLC Repair for:

Siemens - Mitsubishi - Allen-Bradley (Rockwell) - Omron - Delta - Schneider Electric - ABB - Panasonic - Beckhoff

If your model isnt listed send the part number; we likely support it.

Choose Expertise. Choose Epoch Technical.

PLC downtime affects production and delivery commitments.
We diagnose accurately, repair what’s necessary, and get your system back online without pushing replacements

If your PLC is faulty, unresponsive, or throwing alarms tell us the issue and we will handle the rest.