Functional Testers for vehicle control unit tests, Network test

TESSY is a modularly configurable functional test system meeting the specific requirements for vehicle control unit tests. The system is equipped with vehicle-type and manufacturer-specific configurable communication interfaces (CAN, LIN, MOST, FlexRay, K-Line and diagnosis). Their time-critical protocols are controlled by microcontroller-based modules. The on-board software of these modules allows the communication via the respective interface, provides measuring functions and simulates failures. Special PWM and frequency generators are provided for the generation of characteristic signals and telegrams for engine, chassis und equipment sections. They can be adjusted by means of several parameters.

TESSY

Highlights:

Functional test system for motor-vehicle instrument clusters
Modular hardware structure for easy adaptation to the unit under test (UUT)
Simulation of the vehicle components and failure simulation
Generation of typical signals for the functionality checks and the test of system characteristics
Intuitive software based on the Test Sequencer
Macro library with various functions depending on the hardware configuration
IEEE 488.2, USB 2.0, TCPIP, RS232- and IEEE 1394 interfaces for the integration of additional hardware

Hardware Structure:

The hardware of the functional test system is provided in a modular structure and allows various system configurations depending on the tested control devices. Additional hardware components are easily integrated via the standard interfaces ( IEEE 488.2, USB 2.0, TCPIP, RS232, IEEE 1394). The hardware components allow the simulation of characteristic signals within engine, chassis and equipment.

The Software:

Test sequence control, test program editor as well as the user surface of the functional test system are based on the Test Sequencer software from GOEPEL electronic. The Test Sequencer allows the selection of ready test steps from a macro library, their parameter setting and combination in a complete user program. No knowledge of programming languages is necessary, the user only works on a graphic user surface. The contents of the delivered macro library depends on the hardware configuration of the test system.

Special configuration: Network Tester

This special configuration of the modular functional test system TESSY was developed for the test of CAN, LIN and K-line interface in vehicle control units. It includes functions to measure physical interface characteristics, to test communication features and to simulate transmission errors. The combination of CAN measuring technology and diagnostic functions via the K-line allows the execution of particular tests that so fare have not been possible in the laboratory.
The test ensures whether a controller transmits and receives specification-compliant data, whether it impairs communication within the vehicle environment or, in case of disturbed communication, executes uncontrolled reactions under all possible operating conditions in the vehicle.

Functional Testers

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