Visca; Overview Of Visca - Sony BRC-X400 Command List

VISCA

1)
VISCA is a protocol developed by Sony for
controlling a consumer's camcorder.

Overview of VISCA

In VISCA, the side outputting commands, such as
a computer, is called the controller, while the side
receiving the commands, such as a BRC-X400/
X401, SRG-X400/X402/201M2/X120/HD1M2
called the peripheral device. In VISCA, up to
seven peripheral devices including this unit can
be connected to a single controller using
communication conforming to the RS-422
standard. The parameters of RS-422 are as
follows.
• Communication speed: 9600 bps/38400 bps
• Data bits : 8
• Start bit : 1
• Stop bit : 1
• Non parity
Flow control using XON/XOFF and RTS/CTS, etc.,
is not supported.
Peripheral devices are connected in a daisy
chain. As shown in Fig. 1, the actual internal
connection is a one-direction ring, so that
messages return to the controller via the
peripheral devices. The devices on the network
are assigned addresses. The address of the
controller is fixed at 0.
The peripheral devices are assigned to the
addresses, 1, 2, 3... in the connected order,
starting from the one connected nearest to the
controller. These addresses are set when the
controller sends address commands during
initialization of the network.
Note
Each VISCA equipment has VISCA IN and VISCA
OUT connectors.
Set the DTR input (the S output of the controller)
of VISCA IN to H when controlling VISCA
equipment from the controller.
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1) "VISCA" is a trademark of Sony Corporation.
2) The product name of this unit, "Color video camera BRC-X400/X401, SRG-X400/X402/201M2/X120/HD1M2" is
referred to as "the unit" or "color video camera" in this document.
Fig. 1 VISCA network configuration
2)
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3