OG_MU-4-434_v10e Circuit Design, Inc.
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OPERATION GUIDE
5.4.6 Receive response
When issuing the monitor command and extended command, processing is performed at the target station and the
result is returned to the source station. This processing result is output from the source station as a data receive.
The content of the receive response depends on the command issued. For details, refer to the explanation of the
relevant command.
5.4.7 ACK response
When issuing the extended command and so on, an ‘ACK’ is returned to show that the target station received the
command. This ‘ACK’ is output from the source station as an ACK response. The content of the ACK response
depends on the command issued. For details, refer to the explanation of the relevant command.
5.4.8 Error response
If there is an error in the format of the transmit command or control command issued, an error code of the type
shown below is sent in response.
These error codes are required during product development, but you should ensure that errors do not occur with
your product.
It is possible to change the display format by issuing the response display mode setting command ‘@RM = TX’ or
‘@RM = CD’. In the default settings, only error codes are displayed.
Format: response name + ‘=’ + value + terminator
Prefix: ‘*’ = 2Ah, a code that indicates the start of the response string.
Response name: The 2 ASCII characters ‘ER’.
Value: Error code shown in the error code list.
Terminator: A code that indicates the end of the command ‘
C
R
L
F
’ (0Dh, 0Ah).
Error response code
Response character string
Hexadecimal code actually returned from the MU-4
*ER =
1D
C
R
L
F
2A,45,52,3D,31,44,0D,0A
Example: Error response when the ‘@BR’ command is issued
1. When the command ‘@RM = CD’ is issued
*ER = 0A
C
R
L
F
2. When the command ‘@RM = TX’ is issued
*ER = 0A : BR command format error
C
R
L
F
