The start bit and the byte order are not independent. In this example, the start bit should be 16 when Big Endian is used. Big Endian byte order is counted from the Least Significant Bit to the Lowest Address. So for Big Endian, an example code snippet for packing and unpacking data is as follows:
message = canMessage(500,false,8);
pack(message,int16(1000),16,16,'BigEndian')
value = unpack(message,16,16,'BigEndian','int16')
For more information on how "startbit" and "byteorder" are related to each other, please check the "Signals" section in the link below:
