Vaddio Sony EVI-D70 PTZ Camera - Manual (Page 31)

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Command List
Command List
VISCA 1) RS-232C/RS-
422 Commands
Use of RS-232C/RS-422 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-D70/P, is
called the peripheral device. The EVI-D70/P serves as
a peripheral device in VISCA. In VISCA, up to seven
peripheral devices like the EVI-D70/P can be
connected to one controller using communication
conforming to the RS-232C/RS-422 standard. The
parameters of RS-232C/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 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.
VISCA Equipment
IN
OUT
IN
OUT
IN
OUT
VISCA Controller
Fig. 1 VISCA network configuration