PLC and industrial controls · Wisconsin
PLC and industrial controls repair in Wisconsin
Lines and machines stopped by a PLC fault, a dead HMI or a mystery input brought back up. We troubleshoot logic, I/O, networks and panels, and back up programs so the next failure costs less.
What we fix
- PLC faults and stops
- I/O modules and field devices
- Dead or frozen HMIs
- Network and communication errors
- Program backups
Techs from the Milwaukee, Madison and Green Bay regions.
Quick answerLocalSpindle of Wisconsin troubleshoots and repairs PLCs and industrial controls across the state, including Allen-Bradley (Rockwell), Siemens, Omron, Mitsubishi, AutomationDirect, Modicon and GE. We find faults in logic, I/O and field devices, replace failed modules and HMIs, fix network and communication problems, and back up programs.
From our techs
Most PLC problems aren't the PLC
PLCs are reliable. When a line stops on a PLC fault, the cause is more often a field device, a sensor, a loose wire, a blown output fuse or a failed I/O card than the processor. We go online with the program, watch the logic, find what the PLC is waiting for, and trace it to the device.
Wisconsin plants run everything from brand-new controllers to 30-year-old PLC-5s and SLCs. We work on both, and when an old processor or module fails, we find tested replacements or help plan a migration.
Backups and documentation
A surprising number of plants don’t have a current copy of the programs running their equipment. If a processor fails without a backup, recovery is slow and expensive. We back up every PLC and HMI we touch, label the files, and leave you with a copy.
Panels, power and environment
Control panels in dairy, food and paper plants deal with heat, moisture and washdown. Corroded terminals, failing power supplies and overheated cabinets cause intermittent faults that are hard to catch. We look at the panel as a whole: power, grounding, cooling and seals.
Symptoms
What you're seeing, and what it usually means
The alarm names the axis or the unit. These are the causes we find behind it most often.
| What you’re seeing | What it usually means |
|---|---|
| Line stops with a PLC fault | Usually a field device or I/O problem; sometimes the processor or a module. |
| Machine waits on an input that’s there | Wiring, a failing input card or a sensor that’s chattering. |
| HMI dark, frozen or won’t communicate | Power, screen failure or network settings. |
| Intermittent faults in hot or wet weather | Cabinet heat, corrosion, loose terminals or failing power supplies. |
| Network errors between devices | Cabling, switches, addressing or a failed node. |
| Old processor failed with no backup | Recovery from whatever is available and a plan for next time. |
How we work it
PLC and industrial controls: our approach
Go online
Watch the logic and find what it’s waiting for.
Trace it
Wire, device or module.
Fix and back up
Replace, then save programs.
Prove it
Line run with the operator.
A full visit
What a visit can cover
- Processor status, faults and logs
- I/O modules, fuses and field devices
- HMIs and operator panels
- Networks: EtherNet/IP, Profinet, DeviceNet and more
- Power supplies and grounding
- Panel cooling, seals and corrosion
- Program and HMI backups
- Documentation of what changed
On the van
- Laptop with programming software for major platforms
- Meters for I/O and power
- Network test tools
- Common I/O fuses, relays and power supplies
- Backup media
Example service call
Packaging line stops at random on a cheese plant
The call
A dairy plant in Green County had a packaging line that stopped at random a few times a shift with a generic fault on the HMI.
What we did
- Phone. We asked whether the stops increased after washdown. They did.
- On site. Online with the PLC, a photo-eye input dropped out for a fraction of a second during the stops. Its connector was corroded.
- Fix. Replaced the sensor and connector with washdown-rated parts and sealed the cable entry.
- Check. Ran through a shift and a washdown without a stop. Backed up the PLC and HMI.
The result. Line ran clean. The plant got backups it didn't have before.
A typical call, written to show how we work. It isn’t a specific customer.
Talk to a Wisconsin tech
Same problem on your floor?
Call and a tech will tell you what we’d check first, then the closest team heads your way.
- You talk to a tech, not a call center
- The closest Wisconsin team takes the job
- Straight answer on repair, rebuild or replace
Brands
PLCs and industrial controls we work on
Linked brands have their own page. See every brand we service.
- Allen-Bradley (Rockwell)
- Siemens S7 and Simatic
- Modicon (Schneider)
- Omron
- Mitsubishi MELSEC
- GE Fanuc
- AutomationDirect
- Koyo
- Idec
- Keyence
- Beckhoff
- B&R
- Red Lion
- Unitronics
- Phoenix Contact
From the field
PLC and industrial controls: tips from our techs
Keep a dated backup
Store PLC and HMI programs off the machine, and update them after changes.
Use washdown-rated parts
Standard connectors and sensors corrode fast in food plants.
Watch cabinet temperature
Heat shortens the life of everything in the panel.
Allen-Bradley (Rockwell), Siemens S7, Omron, Mitsubishi, AutomationDirect, Modicon, GE, Koyo, Beckhoff and others.
Yes, and we can help plan an upgrade.
Yes, every PLC and HMI we work on, when possible.
Yes, and transfer or rebuild the screens.
Yes: power, wiring, cooling and seals.
We focus on repair and changes needed to get you running. Tell us what you need.
Who comes out
Wisconsin teams for plc and industrial controls
The founding team closest to your shop takes the call. Central and western Wisconsin calls go to whichever team is nearest.
Milwaukee
Southeast Wisconsin. Plc and industrial controls calls in Milwaukee, Waukesha, New Berlin, Menomonee Falls, Germantown, West Allis and nearby towns.
Madison
South central Wisconsin. Plc and industrial controls calls in Madison, Sun Prairie, Middleton, Janesville, Beloit, Watertown and nearby towns.
Green Bay
Northeast Wisconsin and the Fox Valley. Plc and industrial controls calls in Green Bay, De Pere, Appleton, Neenah and Menasha, Oshkosh, Fond du Lac and nearby towns.
Keep reading
Related repair
Machine down?
Get your plc and industrial controls sorted
Call and talk to a tech about the machine, the control and the symptom. The Wisconsin team closest to you takes it from there.
