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Visca Rs-232c/rs-422 Commands; Overview Of Visca - Sony BRC-300 Command List

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1)
VISCA
RS-232C/RS-
422 Commands
Use of RS-232C/RS-422 control software based upon
this command list may cause malfunction or damage to
hardware and software. Sony Corporation is not liable
for any such damage.

Overview of VISCA

In VISCA, the side outputting commands, for example,
a computer, is called the controller, while the side
receiving the commands, such as a BRC-300/P, is
called the peripheral device. The BRC-300/P serves as
a peripheral device in VISCA. In VISCA, up to seven
peripheral devices like the BRC-300/P can be
connected to one controller using communication
conforming to the RS-232C/RS-422 standard. The
parameters of RS-232C/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 addresses of peripheral devices are as follows.
When the address of the controller is fixed at 0
The addresses of the peripheral devices are 1, 2, 3 ... in
order, starting from the one nearest the controller. The
address of the peripheral device is set by sending
address commands during the initialization of the
network.
When the address of the controller is fixed at
1 through 7
The addresses of the peripheral devices will be set on a
preselected number. Within a single system, the same
number can be used only once. If the address-switch
number other than 0 is to be used, change the BRC-
300/P address switch to a different number beforehand.
................................................................................................................................................................................................................................
1) VISCA is a protocol which controls consumer camcorders developed by Sony. "VISCA" is a trademark of Sony Corporation.
Each VISCA device has a VISCA IN and VISCA
OUT connector.
Set the DTR input (the S output of the controller) of
VISCA IN to H when controlling VISCA equipment
from the controller.
Fig. 1 VISCA network configuration
VISCA Controller
VISCA Equipment
IN
OUT
IN
OUT
IN
OUT
3

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