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SACN / E1.31 PRIORITY
At any time if a higher priority sACN stream is received it will take over control a DMX Out channel / Pixel Universe regardless of
other incoming streams or merging. When an sACN stream is stopped gracefully via a stream terminate message the eDMX port
/ Pixel Universe will immediately revert to whatever other sources are present, otherwise the default stream timeout of 3 seconds
applies. If you want to merge 2 sACN streams together they must be of the same priority.
SACN / E1.31 PRIORITY – DMX RECEIVE
When a port is configured for DMX-IN sACN operation the sACN Priority can be set. This permits DMX Inputs to generate sACN
multicast or unicast streams with a specific priority.
DMX512 IN – UNICAST / BROADCAST / MULTICAST
When you feed a DMX512 signal into an eDMX Port configured as DMX-IN Art-Net the following will determine Art-Net unicast or
broadcast:
1. If Broadcast Threshold = 0 the frame is always broadcast on the IP subnet.
2. If Broadcast Threshold > 0 and number of detected Art-Net II/3/4 devices "subscribed" to that universe is less than the
threshold the frame is unicast to each device.
3. If Broadcast Threshold > 0 and the number of detected Art-Net II/3/4 devices "subscribed" to that universe is greater
than the threshold the frame is broadcast on the subnet.
4. If Broadcast Threshold > 0 and zero Art-Net II/3/4 devices are "subscribed" to that universe the frame is broadcast on the
subnet.
5. If Fixed IP is not 0.0.0.0 the frame is only unicast to the specified IPv4 address.
As you can see there are multiple ways broadcast could occur. The implementation is done like this to ensure compatibility with
mixed Art-Net I/II/3/4 device networks but still permit unicast when Art-Net II/3/4 devices are used exclusively.
For DMX-IN sACN multicast frames will be generated when Fixed IP is 0.0.0.0 otherwise frames are unicast to the specified
destination.
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