S7 PLC HMIv1.4
Released September 18, 2026Major
iOS
The latest major update introduces Modbus TCP protocol support, Mac platform compatibility, and block reading performance improvements. As the analysis windows contain no data, the impact remains neutral. Future assessments will determine if these technical additions drive increased adoption among industrial users.
What changed
- New featureAdded support for Modbus TCP protocol to connect with various PLCs and devices.
- PlatformAdded support for running the app on Mac with a single purchase across platforms.
- PerformanceImplemented block reading for all protocols, significantly increasing data retrieval speed.
- PerformanceAdded automatic reconnection logic for dropped connections or device wake-up.
- UXIntroduced live value preview during address selection.
- UXAdded object duplication feature to quickly create sequential address rows.
- UXAdded option to keep the screen awake while connected for panel use.
- New featureIncluded presets and address examples for major PLC brands like Siemens and Schneider.
Reception
50/ 100 impact scoreNeutral
What worked
New feature
no_evidence
What didn't
Performance
no evidenceno_evidence
Marlvel takeaways
- Monitor user adoption of the new Modbus TCP protocol support to determine if it expands the addressable user base beyond Siemens and Schneider hardware.
- Track cross-platform usage metrics following the introduction of single-purchase support on Mac to evaluate impact on total user acquisition.
- Assess the utility of the live value preview feature during address selection to confirm if it reduces configuration time for industrial users.
Original release notes
Modbus TCP is here — and the app now runs on your Mac, too: one purchase covers iPhone, iPad and Mac. Reading got much faster as well: a 30-tag group that took 301 ms now reads in 11 ms on our S7-1200. MODBUS TCP • Connect to Modbus TCP devices alongside LOGO! and SIMATIC S7 — most PLCs, drives, meters and gateways speak it • Coils, discrete inputs, holding registers and input registers, with the data types you already use • Byte order per group and per object (ABCD/CDAB/BADC/DCBA), FC16/FC15 writes, optional 1-based addresses • Presets and address examples for Siemens, Schneider, Allen-Bradley and ABB — no digging through manuals • A ready-made sample set for the Siemens MB_SERVER example FASTER AND STEADIER • Block reading over all protocols — Modbus TCP, LOGO! and SIMATIC S7: a 30-tag group that 1.3 read in 301 ms now takes 11 ms on our S7-1200 (LOGO!: 21 ms → 2 ms) • Automatic reconnect after a dropped connection or a phone waking from sleep • Live value preview while you pick an address — you see what the PLC returns before you save • Duplicate an object to build rows like HR100, HR101, HR102 in seconds • Keep the screen awake while connected, for panel use on a stand