Table 2 Description of the Various Fields of the Message Frame
Field | Size (Bytes) | Description |
|---|---|---|
SYNC | 2 | This field marks the beginning of the frame. The first byte is AA (Hex) and the next byte describes the type of the message. |
Frame Size | 2 | This field presents the length of the entire message including the CHK field. |
IDCODE | 2 | This field is used for identifying the data stream. |
SOC | 4 | This field carries the information about the time stamp and is used for time synchronization of measurements. |
FRACSEC | 4 | This field indicates the time at which the measurements are made for data messages and the time at which the frame is transmitted for other messages. |
CHK | 2 | This field marks the end of the message frame and is used to perform the cyclic redundancy check. |