RS232 Protocol

1
Rotel RAP-1580 / RAP-1580MKII
RS232 / IP ASCII Controller Command List
The RAP-1580/RAP-1580MKII supports an ASCII based RS232 and IP protocol. The
RS232 hardware does not support flow control so care needs to be take when sending
and receiving data to avoid packet loss.
All commands sent to the attached Rotel device must have a terminating “!” character.
Example Command: power_on!
Note: Do not include any spaces in the command, and do not include a carriage return
or line feed after the command, only the “!” terminating character.
Status information from the attached Rotel product with either have a terminating “!”
character or a byte count for variable length text data that may include a “!” in the
returned message. It is up to the sending/receiving control application to properly parse
and process the packets.
Note: The byte count only includes the text data and not the length or “,” character.
RS232 Connection Settings
Baud Rate
Parity
Valid Data Bits
Stop Bit Value
Handshaking
Data Type
115200
N
8
1
None
String
IP Control Settings
The RAP-1580 will accept and respond to IP control commands if the product is
connected to a local network and has a valid IP address.
Commands will be accepted via TCP port 9596, and the unit will send responses back via
the same port.
NOTE: If the Front USB input is selected IP control response will be noticeably slower
while on this input. Therefore, it is recommended if the Front USB input will be utilized in
a system to use RS232 for control instead of IP.
Speaker Level Trim Notes
Center Back
For speaker configurations where there is one Center Back channel, use the Center Back
left channel commands for temporary level adjustments.
Ceiling Middle
For speaker configurations where there are Ceiling Middle channels, use the Ceiling
Front Left & Right channel commands for temporary level adjustments.
Date
Version
Update Description
January 16, 2017
1.00
Original Specification
October 10, 2020
1.01
Update to include RAP-1580MKII in description.