Sony SRG-X400 명령 목록 - 페이지 10

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locked to 0 (for the controller) or 1 (for the

peripheral device).

Due to the nature of the IP communication, the

use of some VISCA functions are limited. For

details, see "Limitation" on page 13.

For how to set an IP address of the camera, see

"Camera IP Setting Command" on page 41.

Communication Method of VISCA

over IP

Communication method

VISCA over IP can process the VISCA

communication between the controllers and

peripheral devices using the messages that can

be identified on the LAN, and sends/receives

them. Because of this, VISCA over IP is not

concerned about the contents of the

communication between the controllers and

peripheral devices. However, the VISCA

communication sequence is different,

depending on the types, as follows.

VISCA command

This is a command from the controller to the

peripheral device.

When the peripheral device receives this

command, ACK is returned. After completing

command processing, a completion notice is

returned. This command uses the socket of

VISCA. The order of completion notices may be

changed if the multiple commands are sent to

the same peripheral device.

VISCA inquiry

This is an inquiry from the controller to the

peripheral device.

When the peripheral device receives this type of

command, the reply for the inquiry is returned.

This command does not use the socket of VISCA.

The order of the replies is not changed if a

multiple commands are sent.

VISCA reply

This is an ACK, completion notice, reply, or error

reply from the peripheral device to the controller.

The classification for sending messages from the

peripheral device to the controller is common.

VISCA device setting command

This is the device setting command from the

controller to the peripheral device as follows.

• Address Set

Sets the address of the peripheral device, and

does not return a reply to the controller. While

using VISCA over IP, the Address Set command

is not sent from the controller because a

Network Change command from the peripheral

device that triggers sending command is not

issued.

• IF_Clear

Sends the reply message to the controller after

clearing, without using VISCA socket.

• CAM_VersionInq

Sends the reply message to the controller,

without using VISCA socket.

Format

These are the specifications of the message

header (8 bytes) and payload (1 to 16 bytes).

Message (9 to 24 bytes)

Message header

Payload type Payload length

Message structure

Note

The actual LAN out method is big-endian, LSB

first.

Payload (1 to 16 bytes)

Sequence number