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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.

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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

OUT