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Institute Mihailo Pupin
Institute Mihailo Pupin is the leading Serbian R&D institution in the field of Information & Communication Techologies.

Automation & Control Systems Ltd
The Automation & Control Systems Ltd is the core division of the Institute Mihailo Pupin, and the owner of the projects: ATLAS Systems and ATLAS-MAX.

The long list of the Institute's references and customers is the best proof of its high professional and techological achievments.

The other related IMP project: VIEW4 Software Package for control of complex processes

You are here:     piko-ATLAS System p-Specification pATLAS Startup
pATLAS Startup & Initialization


pATLAS is a firmware controlled system – consequently, upon the start-up it has to complete its initialization phase to reach the operational state when it is able to continue with regular activities.  Initialization is a procedure during which a proper system RTE (run-time environment) is established, the unavoidable requirement for a successful launch and execution of the pATLAS application programs.  In the computer vocabulary, this procedure is known as “system booting”.  Two types of system startups are recognizable:

Warm Start – the usual system start-up upon power-on, short-term breaks in power supplying and problems in operation, manually via CPU front-panel RST push-button, or on request from the pATLAS Monitoring Terminal.  It recovers the system up to the point in time of the outage occurrence, meaning that all process and control data are restored to the values as in the moment of the system outage.  Warm start provides initialization of all system data which might have been damaged. 

Cold Start – the full system reboot from its inactive status to the full operational mode.  It happens upon the first startup, or on a special system reset request from the pATLAS Monitoring Terminal.  It causes full ATLAS hardware reset, deactivating of all I/O modules, and resetting of all local data buffers.  Based on saved configuration database, the automatic system hardware “plug-and-play” and program diagnostics is accomplished.  The first-time system startup is a special case of the cold start, which assumes a default system configuration - at the very beginning, all configuration data have “factory default values”, which could be changed via the pATLAS Monitoring Terminal (in the SETUP mode).  All changes are saved in non-volatile CPU memory and SD card, and each subsequent cold start is practically bringing the system into that state.


System initialization is followed by visual signal indications – all pATLAS modules are equipped with number of LED indicators, which light in accordance with the actual system status.  If the system initialization is monitored via the pATLAS Monitoring Terminal, this report is more detailed and comprehensive.