Modbus Tester
Read your meters and breakers in plain words.
Pick your device from a list, type its Modbus ID, and see its readings - Current L1 84.2 A, Breaker: Closed. When something does not answer, it says why, in words you can act on.
14-day free trial, all features. Windows 10 or 11 (64-bit). For RS-485 devices, a USB to RS-485 converter.
Devices ready to read
Schneider PowerLogic PM8000, PM5000 and iEM3000 meters; ComPacT NSX, MasterPact MTZ and NT/NW breakers through an IFM; the CET PMC-592 panel monitor. Or any device, from its register list.
Plain words, not register dumps
Readings as named tiles with units, status as words - Breaker: Closed, Trip cause: None - and a checklist when a device does not answer.
Find devices
Asks every Modbus ID on the line whether something is there, so you can add what it finds.
Save readings
Every device's readings at that moment, as a spreadsheet for a test sheet or a report.
Serial or network
A USB to RS-485 converter (Modbus RTU), Modbus TCP, or RTU over TCP through a gateway.
Expert mode too
Every register, function code and setting, a traffic log, register scans, a slave simulator and CSV recording.
Documents
Questions
How does the free trial work?
Install it and choose Start free trial on the first screen. Everything works for 14 days. After that it asks for a licence; your settings are kept.
What do I get when I buy?
A licence key, shown after payment and emailed with your receipt. Type it into the app where it asks for one. The licence is yours to keep - one payment, no subscription.
Does it need the internet?
Only once, to activate the key. After that it works offline, and checks in now and then when it does have a connection.
I have a new PC. Can I move my licence?
Yes. In the app, open Licence and choose Move to another PC - or, if the old PC no longer starts, email Support@wrulx.com and we will free it. Then activate the key on the new one.
Our site PC has no internet, or we pay by invoice.
Email Support@wrulx.com with the machine code shown on the app's licence screen, and you will get an offline licence for that PC.