CANstressD and CANstressDR Resistance on the Network Application Areas Reproducible simulation of line failures: > Error statuses in accordance with ISO 11519-2 (line/line short circuit, line/supply voltage short circuits, interruptions) > Simulation of bit corruption > Targeted imposition of bus levels CAN networks are highly tolerant in respect of disturbances of the bus communication and failures. In order to test whether a system is behaving properly in case of disturbances or failures, a device is used to disturb the CAN bus, its physical properties and the logical levels (recessive and/or dominant) in a targeted, reproducible way. With CANstressD (Digital) or CANstressDR (Digital and Resistor Network), the CAN developer uses a comprehensive disturbance instrument. Examination of disturbance handling by CAN systems: > Test environment for the development of CAN controllers and CAN nodes > Targeted disturbance of bus nodes by destruction of its CAN messages at any bit position > Targeted manipulation of bit fields within the CAN messages (SOF, arbitration, data, CRC, ACK, etc.) > Testing the behaviour of the bus nodes in the event of errors > Triggering of external devices > Inspection of recovery behaviour after disturbances in ECUs Features and Advantages CANstress is a stand alone hardware module that is inserted direct-ly onto the CAN bus. It contains various triggering conditions and disturbance logics. CANstressDR includes a number of resistors that can be software-controlled. These resistors are used to force different bus levels onto the bus lines by limiting the voltage supplied. Activation of the Disturbance When CANstress is in the neutral position, the bus is undisturbed. When the system is triggered, the configured disturbance sequence becomes active. The disturbance sequence consists of a sequence of interfering pulses at the bit level or the BTL level. A single disturbance pulse can force a dominant or recessive level on the bus, or leave the bus unaffected. Functions CANstress supports a range of error and test modes, e.g.: > Emulation of line failures > CAN system failures > Accompanying development tests of electronic control units > Disturbances of CAN controllers > Programmable short circuits and interruptions A programmable static capacitor inserted between the bus lines can be used to simulate various line lengths. 4/10 More Information: www.vector.com/contact