SCADA & Data Logging for Mitsubishi PLCs

Connect TagFirst to your Mitsubishi PLC, map the D registers you care about, and get live viewing, data logging and traceability — without writing any code.

If your line runs on a Mitsubishi PLC, TagFirst gives you a configurable SCADA layer for data logging, live viewing and traceability — no custom development. Point it at the PLC, map your registers, and deploy a runnable package to the shop-floor PC.

Supported Mitsubishi series

TagFirst-Solo (Phase 1) connects to the most common Mitsubishi families using D register addressing over TCP/IP or serial.

SeriesAddressingConnection
Q SeriesD registerTCP/IP, Serial
FX SeriesD registerTCP/IP, Serial
iQ-R SeriesD registerTCP/IP, Serial

How it connects

In the configurator you enter the PLC's IP address (or serial port), then map the data registers you want to read and write. TagFirst supports INT, DINT, REAL, BOOL and STRING data types, auto-calculates addresses, and lets you upload a tag list straight from Excel. BOOL bits are auto-expanded with SPARE fill so your bit-packed status words map cleanly.

The PLC always stays master. A heartbeat watchdog writes 0→1→0→1 every second to a dedicated tag, and the PLC raises an alarm if the runtime ever stops — so your machine logic is never dependent on the PC.

Logging and traceability

Once tags are mapped, configure what gets logged and when. TagFirst writes to Microsoft SQL Server, auto-creating tables from your configuration. Add string and numeric validation (prefix, exact, suffix, within, range), duplicate checks against the local database, and multi-station verification that confirms a part passed the previous operation before this one saves.

Every package is version-stamped and dongle-locked. Learn more about the no-code approach, or see all supported hardware.

FAQ

Questions about this.

Which Mitsubishi PLCs does TagFirst support?+
TagFirst-Solo supports the Q, FX and iQ-R series using D register addressing over TCP/IP or serial. If you run a different Mitsubishi family, contact us — we may be able to add it.
Do I need GX Works or any Mitsubishi software to use TagFirst?+
No. TagFirst connects to the PLC directly over its network or serial interface. You only need to know the PLC's IP address (or serial settings) and the D register addresses you want to read and write.
Can TagFirst write back to the Mitsubishi PLC?+
Yes. You can map both read and write tags. A common use is the heartbeat watchdog, where the runtime writes to a dedicated register the PLC monitors.
What database does the logged Mitsubishi data go to?+
Microsoft SQL Server. The desktop runtime auto-creates the tables based on your tag and traceability configuration — no DBA needed.
GET STARTED

Configure it.
No code.

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