PLC repair, without losing your program
CPUs that won't boot, I/O channels that dropped out, backplanes throwing bus errors — we repair PLC racks, CPUs and communication modules at component level, and your program and configuration stay untouched.
Every module gets a reference, a report and a warrantyA process built around trust
Reception & inspection
Your module or rack arrives, gets logged under its own case reference, and goes through a full visual and electrical check.
Diagnosis & quotation
We isolate the fault to the CPU, power supply, backplane or a specific I/O channel, and send a clear quote. Nothing gets repaired until you approve.
Repair, test & return
Once approved, we repair and functionally test the module — your program and configuration are never touched — then ship it back with a full report.
Common PLC faults
- CPU that won't boot, or a battery-backup memory loss
- I/O module channels that have dropped out or read incorrectly
- Backplane or internal bus communication errors
- Profibus, DeviceNet or Ethernet port failure
- Power supply module failure inside the rack
- Corrupted firmware after a power event
- Intermittent faults that only appear under vibration or heat
- Physical connector and backplane pin damage
Repair happens at component level. Your program logic and configuration are never modified — we work on the hardware, not your code.
Brands and series we work on
- Siemens S7-300 / S7-400 / S7-1200 / S7-1500
- Allen-Bradley ControlLogix / CompactLogix / SLC 500
- Schneider Electric Modicon series
- Mitsubishi FX and Q series
- Omron CJ and CP series
- Legacy and obsolete CPU and I/O modules
What every PLC repair includes
Traceability
A unique case reference and a full repair report follow your module from the moment it arrives.
Testing
Every repaired module is functionally tested channel by channel before it leaves the workshop.
Program untouched
We repair the hardware, not your logic. Your program and configuration stay exactly as they were.
Warranty
Repairs are backed by a standard warranty, so you're covered once the module is back in the rack.
Repair or replace?
Choose repair when
- The exact module or CPU is discontinued or hard to source
- You want your program and configuration left untouched
- A PLC platform migration isn't planned yet
- You need a traceable repair with a report and warranty
Consider replacement when
- You need the line running now and a matched spare is ready
- A platform migration is already planned and budgeted
- Newer firmware or fieldbus support is actually needed
Get it to us the right way
- Back up your program before removing the CPU, if you can.
- Photograph the rack and note the slot position of the faulty module.
- Label every wire and connector before disconnecting anything.
- Write the case reference on both the module and the box.
- Describe the fault: which channels, which fault LEDs, and when it started.
- Use anti-static protection and pack it so it can't shift in transit.
When the fault is really in the cabinet
Some PLC faults trace back to wiring, grounding, or a rack-level issue a bench test can't reproduce. When that's the case, we can send an engineer to you instead.
Ready to get your PLC back online?
Tell us what's failing and we'll take it from there.