BEL BM-A1-S User Manual page 23

BEL DIGITAL AUDIO
NACK format
A reply indicating that an error occurred communicating with the MM2 it carries the command
0xC1. Brief error information is carried in two data bytes.
Byte 0
Byte 1
Error message values
Value Message
A time out occurred after receipt of a valid start character
1
A character was detected before receipt of a start character.
2
A checksum error occurred. The erroneous value is placed in Byte 1
3
RS232 format
8 data bits, no parity, 2 stop bits, 9600 Baud.
 2004 BEL (Digital Audio) Ltd
BM-A1-S
Error message value
Erroneous checksum character
20
BM-A1 serial protocol
Version 0.3