PLC Repair
PLC CPU, I/O and communication module repair for Canada and the USA
- Free evaluation
- 24–72 hr typical
- 12-month warranty
- Tested on our jigs
Short answer
Can a PLC be repaired?
Yes. PLC CPUs, power supplies, I/O cards and communication modules can usually be repaired at component level, including obsolete models the manufacturer no longer supports. We find the failed components, repair them and test the module under power before it ships back with a test report and a 12-month warranty.
What we repair
What we repair on a PLC
CPU modules
Processor modules that fault, will not run or lose their program.
PLC power supplies
Rack and module supplies that are dead, unstable or overheating.
Digital & analog I/O
Dead channels, blown outputs and inaccurate analog inputs and outputs.
Communication modules
Ethernet, PROFIBUS, DeviceNet, ControlNet and serial modules.
Backplanes & racks
Chassis and backplane faults that cause modules to drop out.
Obsolete PLCs
Discontinued platforms such as Siemens S5 and Allen-Bradley PLC-5 kept running.
Diagnosis guide
Common PLC faults we fix
CPU in fault or stop mode, will not run
Failed CPU components, memory or a supply problem
Outputs stuck on or dead
Blown output transistors, triacs or relays
Analog values drifting or wrong
Failed converter, reference or input protection
Network or communication loss
Failed communication chipset, transceiver or connector
Power supply LED off or flickering
Failed capacitors or switch-mode components
Quality
How we test every repaired PLC
Parts replaced is not the same as fixed. Every unit is proven under power before it leaves our Mississauga, Ontario repair centre.
- 01
Photos and condition report on arrival
- 02
Root cause found before we quote
- 03
Powered up and function-tested on our bench
- 04
Test report ships with every module
All makes & models
We repair every PLC brand
We repair PLCs from any manufacturer, current or obsolete. These are some of the brands and series we see most often. If yours isn't listed, we still repair it.
Siemens
- SIMATIC S5
- S7-300
- S7-400
- S7-1200 / 1500
Allen-Bradley
- SLC 500
- PLC-5
- ControlLogix
- CompactLogix
Any brand. Any model.
Mitsubishi MELSEC · Omron · Schneider Modicon · GE Fanuc 90-30 · 1,000+ brands
Don't see yours? Ask a technician
Brand names are trademarks of their owners and are used only to identify the equipment we repair.
Your options
Repair, exchange or replace?
Repair your unit
Your original unit, repaired at component level and tested. Usually a fraction of the price of new.
Request a RepairExchange unit
A tested replacement at a lower price. Ship us your unit and we ship the replacement once it arrives.
Ask About ExchangeReplacement part
New, surplus or refurbished, sourced from 1,000+ brands, including discontinued parts.
Request a QuoteFAQ
PLC repair questions
Will I lose my PLC program?
Keep a backup of your program before you ship any PLC CPU. We test the hardware, and you reload or confirm your program when the module is back.
Do you repair obsolete PLCs?
Yes. We repair discontinued PLCs at component level, so proven machines keep running after the manufacturer stops support.
How long does PLC repair take?
Typical turnaround is 24–72 hours once you approve the quote.
What warranty comes with a PLC repair?
Every PLC repair comes with a 12-month warranty.
PLC down? Let's get it running again.
Free evaluationNo work without your approval12-month warranty