Although CAN bus experts have rich theoretical knowledge and practical experience, but to the scene to analyze and solve problems, but also need a strong instrument as a support, confirm with facts, and then quickly determine the reasons and propose feasible solutions. This article first introduced what is the event tag, followed by a description of the CANScope support event tag, and finally elaborated on how to use the event tag, specifically follow the Xiaobian together to find out. The CANScope has a 512M byte waveform buffer, but in some special cases it may not be able to capture the waveform of interest to the user. At this time, its unique event marking function can be used to maximize the recording of waveforms that the user cares about. As shown in the figure below, when the event marker is enabled, the waveform that satisfies the condition is preferentially stored. Frame ID flag: Stores waveforms when certain bits of the frame ID meet the set conditions; Frame data mark: store waveforms when certain bits of the frame data satisfy a set condition; Error frame flag: store the error frame waveform; Eye template markers: Stored when the waveform touches the eye diagram template. 1, frame ID tag In the CAN network, generally, a frame ID is used to distinguish different nodes. If only the waveform of a certain node is to be stored, a frame ID tag needs to be used. As shown in the figure below, set the lower 2 bits of the frame ID to 1. As shown in the figure below, the corresponding CAN message of the ID is marked. 2, frame data mark The frame data tag is generally used to set a signal to satisfy the condition and store the corresponding waveform. As shown in the figure below, when the lower 4 of the first byte of the frame data is 1, the corresponding waveform is stored. As shown in the figure below, the packets and corresponding waveforms satisfying the data conditions are marked. 3, error frame mark When you want to capture the waveform of an erroneous frame, you only need to check the "Use Frame Error Flag" check box in the event marker window. As shown in the figure below, the error frame waveform is marked. 4, eye template mark The eye diagram template is used to regulate the scope of each bit. You can set the “forbidden area†through the template. Any waveform that touches the “forbidden area†will be marked. The specific operation steps are as follows: 1) Set eye template in eye window; 2) Check the "Use eye template" check box in the event tag window; As shown in the figure below, some of the glitches in the collision template waveform are captured. Connecting Terminals,Micro Connecting Terminal,Aluminum Connecting Terminals,Connecting Copper Terminal Taixing Longyi Terminals Co.,Ltd. , https://www.longyiterminals.com
