sACN (Streaming ACN) Protocol
sACN (or Streaming ACN) is a preferred method of sending and receiving DMX-over-Ethernet to and/or from
a CueServer.
The following table lists the general specifications for the CueServer implementation of sACN:
• Compliant with ANSI Standard E1.31-2009 (sACN)
• May send and/or receive up to 128 universes of sACN simultaneously
• May send and/or receive sACN packets with an arbitrary universe number between 1 and 63999
• sACN is sent at a maximum rate of 40Hz for each universe when channel values are changing
• sACN is sent at a minimum rate of 1Hz for each universe when channel values are static
• Supports the sending of user-defined priority levels for each universe
• Received sACN is merged with hardwired DMX designated for the same universe
• Ignores incoming data marked as Preview Data
• Performs immediate stream termination when a Stream Terminated packet is received
• Maintains proper sequence number transmission separately for each output universe
• Sends the universe’s name as the sACN source name for each universe
• Ignores packets with start code 0xDD (used for slot-by-slot priority)
• Each universe times out after 2.5 seconds when no packets for that universe are not received
• CueServer does not receive its own sACN output
For more information about sACN, please visit the
ESTA Technical Standards Program
at
.
Interactive Technologies, Inc.
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