Copy the screen
Install LK Go and rebuild the operator screen while the panel still works. Free, about 15 minutes per machine.
Line never stops. Three tools see to it.
LineKeeper makes tools for the people who keep production running: a phone HMI for the day a panel dies, a backup touchscreen that stands on the machine, and a free maintenance system that runs on a PC in your plant. Allen-Bradley, Siemens S7, Modbus. No cloud required.
LK Go Phone HMI
Copy the operator screen while the panel still works. Run the machine from your iPhone or iPad the day it doesn't.
- Allen-Bradley, Siemens S7, Modbus TCP
- Find by action: press the real button, get the tag
- Dashboards, alarms, machine history
LK Up Maintenance system
A free CMMS that runs as one program on a PC in your plant. Technicians work from their phones, offline, and sync later.
- Work orders on the phone, with status history
- Windows, macOS, Linux or Docker
- Core free, never per seat
LK On Backup touchscreen
A 7″ or 10″ industrial touchscreen that stands on the machine while the replacement panel ships, and logs, graphs and reads the ladder between failures.
- Boots into the panel you built in LK Go
- History on board: up to 5 years
- Adds SLC-500, MicroLogix, OPC UA, Modbus RTU
How they fitOne machine, three moments
Each tool works alone. Together they cover the whole outage.
A panel dies once every few years. The work around it, before, during and after, is where the downtime hides.
Before · tonight
The day it dies · the weeks after
Keep producing
Run the machine from the phone with Pro, then hand the screen to LK On on the machine until the replacement arrives.
Every day
Keep the record
LK Up holds the work orders and the repair history. Diagnostic episodes from LK On arriving as incidents there is planned.
LK Go and LK On are a temporary bridge, not a certified HMI and not a safety device. Panel dead right now? Start with the 10-minute triage guide, or kill an HMI in the live demo first.
Who it's forSame tools, three jobs
In the plant, in the van, or shipped with the machine.
The plant
A panel dies once every few years and costs days of production each time. Copy the screens of your critical machines now, free, in an evening. When one dies, the operators keep working and the replacement ships on your schedule. Track the repair in LK Up.
Maintenance · start with LK Go →The integrator
You sold the customer three machines. One LK On holds a panel and dashboards for each, switches between them and remembers everything: one backup for the whole cell. Set it up in an hour from your own project files, and the day a panel dies you support the customer without a site visit.
Ship it with the machine →The service engineer
One kit in the van covers twenty machines at a dozen customers. On site: plug in, see every tag, read the ladder live, write a setpoint, without licensed engineering software on the laptop. When a customer's panel dies, you are the one who gets the line running today.
Service & commissioning · LK Go + LK On →Free toolsNo app, no account
Free tools and guides for a bad day at the machine
- HMI panel died: the 10-minute triage guideThe checks that catch the cheap failures before anyone orders hardware.Guide
- HMI project converterFactoryTalk View, View Designer, TIA Portal or Weintek export in, an LK Go screen out. Files never leave your computer.In the browser · free
- L5X ladder viewerRead a Studio 5000 export rung by rung without Studio 5000.In the browser · free
- Gear & accessoriesAdapters, Wi-Fi bridges, mounts and gateways that get a phone and a screen onto the machine.What to buy
- All guides & screensSymptoms, fixes and replacement options for the panels that fail most.PanelView, Siemens, Modbus…
FAQFair questions
What does LineKeeper make?
Three tools for the people who keep production running. LK Go is a free iPhone and iPad app that copies a machine's operator screen and runs the machine from the phone the day the HMI panel dies. LK On is a 7″ or 10″ industrial touchscreen that takes that screen and stands on the machine while the replacement ships, and logs, graphs and reads the ladder between failures. LK Up is a free maintenance system (CMMS) that runs on a PC in your plant, with technicians working from their phones.
Which one do I need?
A panel is dead or flaky: start with LK Go, free, today. The machine needs a screen of its own for weeks, or you want 24/7 history and live ladder: LK On. You want work orders and repair history without a per-seat bill: LK Up, in early access. Prices for all three are on the pricing page.
Do the products need each other?
No. Each one works on its own. LK Go and LK On share screens: a panel built in the app moves onto the touchscreen in two taps, and back. A link from LK On to LK Up, turning diagnostic episodes into incidents on the right asset, is planned.
Which PLCs do they work with?
LK Go covers Allen-Bradley ControlLogix and CompactLogix over EtherNet/IP, Siemens S7comm (S7-1200/1500 with PUT/GET enabled and non-optimized DBs: a CPU access setting, not a program change) and Modbus TCP. LK On adds legacy PCCC (SLC-500, MicroLogix; PLC-5 experimental), PowerFlex drives (read-only), Modbus RTU and OPC UA. LK Up does not talk to PLCs.
Does anything need the cloud?
No. LK Go talks from the phone straight to the controller, LK On runs everything on the device, and LK Up runs on your own PC with phones that work offline and sync later. Internet is only needed for optional alarm messages, remote access and software updates.
Our line is down right now. Can you help faster?
Two things, both free: install LK Go (it puts live values on a phone in about 15 minutes, and start/stop buttons once the right tags are identified) and tell us in the form below that the line is down. The remote triage call is free. Start with the 10-minute triage guide.
We're a system integrator. Where do we fit?
As the engineer on the call: the customer installs LK Go, you name the tags that matter, they build the screen and you sanity-check it live. LK On holds a profile per machine and gives you revocable remote access with an audit log. How it works is on the integrator page. Need a driver, report or export your customers ask for? Tell us: integrator requests reach the developer directly.
QuestionsA real engineer answers
Ask an engineer. Free.
Stuck on a dead panel, a stubborn PLC, or wondering which tool fits your setup? Write to us. A real engineer answers, line-down messages first.