Vaddio Sony EVI-HD1 PTZ Camera - Manual (Page 19)

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Command List
Command List
VISCA 1) 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 side outputting commands, for example,
a computer, is called the controller, while the side
receiving the commands, such as an EVI-HD1, is
called the peripheral device. The EVI-HD1 serves as a
peripheral device in VISCA. In VISCA, up to seven
peripheral devices like the EVI-HD1 can be connected
to one controller using communication conforming to
the RS-232C standard. The parameters of RS-232C 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 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.
The VISCA devices each have 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.
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1) VISCA is a protocol which controls consumer camcorders developed by Sony. “VISCA” is a trademark of Sony Corporation.
Fig. 1 VISCA network configuration
VISCA Equipment
IN
OUT
IN
OUT
IN
OUT
VISCA Controller