JBL Synthesis SDP-45 4K - Manual (Page 3)

Command format:
ASCII strings ended with carriage return (code 13). All Host Controller commands (input to SDP-45) and SDP-45
Response (feedback) use the same format.
# D1 D2 C1 C2 C3 C4 P1 P2 ...
#
Command start character. In Hex this is 23 or \x23. For TCP/IP: use URL code %23
D1 Device category, one digit. For SDP-45 D1 must be 1.
D2 RS485 device ID, 1 digit. For SDP-45 D2 should remain 0.
D2=0 typically and can only be changed through the front panel menu!
C1..C4 Command name (4 chars) , typically uppercase ASCII letters.
P1,P2 Parameters are two or more arbitrary ASCII characters.
Special end character \r: Decimal code 13 or in hex 0D over RS232,or URL dot (.) character over
TCP/IP
Response format:
Response format is the same as commands, repeating the D1,D2,C and P bytes (P bytes may carry either an
actual status value or ?? in case of errors).
Example of Command and Response for power:
Description String Example (RS232): String Example (Ethernet):
command: query power status #10MPWRQS\r %2310MPWRQS.
response: power is off (in standby) #10MPWR00\r %2310MPWR00.
command: power up #10MPWR01\r %2310MPWR01.
response(delayed): power is on #10MPWR01\r %2310MPWR01.
Communication Notes:
All characters preceding the # of a command, and following the will be ignored. Do not insert #,
spaces, , or other non-ASCII characters inside the command string.
When using TCP/IP, replace carriage return code with dot '.' and # with %23.
Do not assume that the number of response bytes P1,P2,... is fixed. Allow up to 320 bytes to be read or
until a is encountered.
The format of the automatic responses is the same as the response to a serial command sent with the
parameter bytes P1 P2 = "QS".