Sony EVI-HD1 Technical Manual - Page 19

Command List Command List VISCA1) 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 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. Fig. 1 VISCA network configuration VISCA Controller VISCA Equipment IN In VISCA, the side outputting commands, for example, OUT 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 IN to one controller using communication conforming to the RS-232C standard. The parameters of RS-232C are as follows. OUT • Communication speed: 9600 bps/38400 bps • Data bits : 8 • Start bit : 1 • Stop bit : 1 • Non parity IN Flow control using XON/XOFF and RTS/CTS, etc., is not supported. OUT 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. ...1) VISCA is a protocol which controls consumer camcorders developed by Sony. "VISCA" is a trademark of Sony Corporation. 19