Repair by equipment
Repair of PLCs
Programmable logic controllers for industrial machines and processes.
Symptoms
What brings this equipment to the bench
If the machine's behaviour matches one of these, the diagnosis will sort it out. None of them requires the manufacturer to still support the line.
- Will not power up, or restarts on its own mid-cycle
- Loss of program or retentive memory after a power outage
- I/O module not reading a sensor or not driving an output
- Communication failure with the HMI or the SCADA system
Bench scope
What TECSI does on PLCs
- Backup of the program and the retentive memory before any intervention, including before a battery change
- Internal power supply repair: electrolytics, regulator, ripple measurement on the oscilloscope and rail voltage checks under load
- Backup battery replacement with memory preserved
- CPU testing in a bench rack, with scan cycle and watchdog
- Channel-by-channel I/O module testing with signal simulation: dry contact, 0 to 10 V, 4 to 20 mA, PT100, thermocouple
- Repair of the communication interfaces (serial, Profibus, DeviceNet, Ethernet/IP, Modbus) and of the isolation optocouplers
- Technical cleaning of board and connectors, recovery of oxidized contacts on the rack backplane
- Final test with the rack assembled and I/O simulated, under burn-in
Whatever cannot be recovered is stated in the report, before the quote.
12h quote24/7 emergencyFree loaner
Repair
How the equipment goes through the workshop
The same process applies to every brand and every piece of equipment. Nothing is carried out before the quote is approved.
- 01
Intake and identification
Entry record, photos of the condition on arrival and identification of manufacturer, model, serial number and firmware version.
- 02
Diagnosis and report
Bench analysis of the fault, testing the input, power, control and feedback stages. The report identifies the root cause, not just the burned component.
- 03
Quote
Customer approval before any intervention. An unrecoverable part or an economically unviable repair is reported as such.
- 04
Repair
Component replacement with new or approved equivalent parts, solder rework, technical cleaning and insulation restoration.
- 05
Functional test under load
The equipment is tested under real operating conditions, not merely powered up on the bench.
- 06
Burn-in and release
A continuous test period before return, accompanied by the technical report of the work performed.
- 07
Warranty
Warranty on the work performed, with technical support after the equipment is returned.
Commitments
Applies to every service
The commitments below do not depend on the equipment, the brand or the service hired.
12h
Quote in 12 hours
Diagnosis and commercial proposal delivered within 12 hours of receiving the equipment.
24/7
Emergency response
Team mobilized outside business hours, on weekends and holidays, for stopped lines.
Free
Loaner equipment
While we repair yours, we lend an equivalent unit so production does not stop. At no cost.
Free
Free assessment
Full technical evaluation of the equipment with no obligation to approve the repair.
Included
Free technical support
Post-repair follow-up and ongoing technical guidance at no additional charge.
Multi
Multi-brand parts
Spare parts stock: IGBTs, encoders and resolvers, including for discontinued lines.
Repair by equipment
Other equipment we repair
Variable Frequency Drives
Speed control of electric motors in automation systems.
Servo Drives
Precision motion and positioning controllers for servomotors.
Servomotors
High-precision electronic motors for industrial automation.
HMIs
Human-machine interfaces for real-time machine monitoring.
Electronic Boards
Repair of printed circuit boards and electronic modules.
Robots and Robotic Devices
Programmable mechatronic equipment, robots and industrial arms.
Soft Starters
Soft start components for electric motors.
Spindle Motors
High-speed motors for machining and cutting.
Industrial PCs
Industrial computers, IPCs and shop-floor embedded systems.
Stepper Motor Drivers
Control converters for stepper motors.
Direct Drives
Direct drive systems without mechanical intermediaries.
AC and DC Power Supplies
Power supplies for alternating and direct current.
Frequently asked questions
Do you repair PLCs of any brand?
Yes. PLCs repair is multi-brand and covers discontinued lines, with a spare-parts stock of IGBTs, encoders, and resolvers, including for what is out of production.
How long until I get the quote?
Within 12 hours of receiving the equipment, with the diagnosis and commercial proposal detailed before any work begins.
Do I have to stop production during the repair?
Not necessarily. While we repair yours, we lend an equivalent unit so production keeps running, at no cost. There is emergency service outside business hours, on weekends and holidays, for a stopped line.
Are the assessment and the repair guaranteed?
The technical assessment is free with no obligation to proceed. Once repaired, the equipment comes back with a warranty and post-repair technical support.
Send us the equipment. We give production back.
Free assessment and a quote within 12 hours. If the line is down right now, talk straight to the technical team on WhatsApp.
You need it, we solve it.