Signal Waveform & Data
Monitoring CAN HIGH and LOW simultaneously is important when monitoring a CAN communication waveform. When the CAN HIGH signal rises to 3.5V and the LOW signal drops to 1.5V (voltage difference between HIGH and LOW signal is 2V), and at a BUS IDLE state (DIGITAL "1") with a reference voltage of 2.5V, "0" is recognized. In addition to comparing HIGH and LOW signals if an opposite waveform is detected with a reference voltage of 2.5V, check if current cam signal is transferring correctly.
Continuous "0" signal above 6BIT means the occurrence of error in CAN communication. 1BIT is easily distinguished as calculating the time of "SOF" (START OF FRAME), which indicates when the start of frame occurs. Check if "0" signal above 6BIT is detected continuously, when monitoring CAN communication waveform.