RPAC • What is RPAC – ‘Rapid Prototyping for Automatic Controls’ – Protocol for interfacing between CAT ECM’s and commercial rapid prototyping systems (xPC). – Uses CAN to communicate between ECM and rapid prototyping hardware – Extension of CCP (CAN Calibration Protocol) • Uses multiple CAN messages to work w/ CAN object buffering mechanisms which prevents need for ISR implementation on xPC Electrohydraulic Products Electronic & Electrical Systems RPAC • Modes of Operation – APP (Application) Mode • Allows communication w/ ECM that already has software built, allowing override (bypass) of algorithms that are in the software. • Works by reading any data in ECM and writing to override variables in the software. • ByPass mechanisms (if/then/else) structures built into software to facilitate (typically already in code for calibration purposes). • Standard ECM library that is compiled w/ software which facilitates RPAC CAN communication. – No setting up specific CAN messages for a particular application. Electrohydraulic Products Electronic & Electrical Systems RPAC • Modes of Operation cont. – I/O Mode • Allows production Cat ECM to be used for I/O interface w/ machine/engine • Standard flash file for ECM, which allows any/all ECM I/O to be configured by rapid prototyping hardware. (No coding required). • Particularly good for ‘blank slate’ designs. Electrohydraulic Products Electronic & Electrical Systems RPAC • Demonstation: – I/O Mode Electrohydraulic Products Electronic & Electrical Systems