15
c
ontrol
m
aster
c
oNtrol
m
aster
F
uNctioNs
This section describes the individual functions of the Control Master device in a Pro64 network.
Enumeration
When the Control Master is powered on, its first job is to identify and count all connected A‑Net devices in the
network in a process called
enumeration
. The time for this process will vary based upon the number of Pro64
devices in a system. This process cannot begin until the host Yamaha device has finished its own power‑up cycle
when a 6416Y2 A‑Net Interface Card is the Control Master. Electrical power for the card comes from the Yamaha
host device.
Enumeration is an automated process performed by the command and control portion of A‑Net. There are no
user‑controllable functions or settings.
During the enumeration process, all connected A‑Net devices will flash their blue A‑Net LEDs, indicating that a
request to be added to the Pro64 network is being made. Once granted entry by the Control Master, the individual
device’s blue A‑Net LED will light solid to indicate that it is now receiving valid A‑Net packets and is part of the
Pro64 network.
RS–232/422
STEREO LINK
6416
Y2
B
A
ON
CTL
CLK
AUTO
ERR
1 2 3 4 5 6 7 8 9 10 11 12
The blue LED is used to indicate network status.
If valid A‑Net packets are not received, the device will reset and wait until a valid A‑Net stream is detected.
During enumeration, any conflicts will also be resolved. For example, consider a new installation using eight
input devices set to the same A‑Net Slot range with all channels activated during a bench configuration. When all
these input devices are connected and then powered up, only
one
of them will be allowed to have all 16 channels
activated. The remaining seven modules will have their audio channels deactivated. Conflicts with channel
activation on 6416Y2 cards must be resolved manually if Slot activation is controlled via DIP switches or by using
the card’s Device Window from within Pro64 Network Manager.
Adding Pro64 Devices to a Network
When a new device is added to an existing Pro64 network, the new device makes a request to the Control Master
for inclusion in the network. During this time, the new device’s blue A‑Net LED will flash. When the new device
has been enumerated by the Control Master, its blue A‑Net LED will then light solidly to indicate that the Control
Master has granted the device access to the network. Adding a new device will interrupt network operation
briefly while enumeration occurs,
except
if the new device is connected to an open port on an MH10 or MH10f
Merger Hub already in the network.
