Command List; Visca Rs-232C Commands - Sony EVI-HD7V Technical Manual

1)
VISCA RS-232C
Commands
Use of RS-232C control software which has been
developed 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 device producing the commands, for
example, a computer, is called the controller, while the
device receiving the commands, such as an EVI-
HD7V/HD3V, is called the peripheral device. The
EVI-HD7V/HD3V serves as a peripheral device in
VISCA. In VISCA, up to seven peripheral devices like
the EVI-HD7V/HD3V can be connected to one
controller using communication conforming to the RS-
232C standard. The parameters of RS-232C are as
follows.
• Communication speed: 9,600 bps/38,400 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 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.
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1) VISCA is a protocol which controls consumer camcorders developed by Sony. "VISCA" is a trademark of Sony Corporation.

Command List

The VISCA devices each have a VISCA IN and
VISCA OUT connector.
Set the DSR input (the DTR output of the controller)
of VISCA IN to H when controlling VISCA equipment
from the controller.
Fig. 1 VISCA network configuration
VISCA Controller
Command List
VISCA Equipment
IN
OUT
IN
OUT
IN
OUT
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