IEC104 SimX - SCADA RTU Master

IEC104 SimX is a native iOS master (controlling station) simulator and test client for the IEC 60870-5-104 telecontrol protocol used in SCADA and substation automation. Connect to any IEC 60870-5-104 slave or RTU over TCP, run interrogations, issue commands, and watch live process data — all from your iPhone or iPad. Built for commissioning engineers, integrators, and technicians who need a quick, reliable 104 master in the field without hauling a laptop. FEATURES • Full TCP connection handling — STARTDT/STOPDT, TESTFR keep-alive, and the t1/t2/t3 timers and k/w send/receive windows from the standard. • General Interrogation and Counter Interrogation, with the returned points shown in a live table. • Commands in the control direction: single, double, regulating-step, and set-point — with Select-before-Execute (SBO) or direct execute, and optional CP56Time2a time tags. • Clock synchronization and read commands. • Live monitor point table: value, quality flags, cause of transmission, time tag, and update count per information object address. • Timestamped frame console for every frame in and out, with an optional hex view for debugging the wire protocol. • Configurable parameters: common address, COT/ASDU/IOA field sizes, timers, and windows — defaulting to the universal 104 values. DESIGNED FOR • Substation and SCADA commissioning • RTU and gateway integration testing • Protocol learning and troubleshooting PRIVACY IEC104 SimX collects no data. It has no accounts, no analytics, and no ads. It connects only to the devices you configure, and all settings stay on your device. This is a one-time paid app with no in-app purchases or subscriptions.