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We buy a software "Canopen conformance Test", it's a National Instruments software. This software is used to valid a Canopen slave board. It's verifie if slave board is compliance with Canopen protocole. I use this software to valid a CANopen board I/O digitals (ds401). When I launch the test, I have a default detected on the test PDO n°3. But for me, the sequence is correct.
the CANopen Conformance Test is actually supported by the CAN-CiA (CAN in Automation) organization. Please contact headquarters@can-cia.org with your problem description.