Sony BRC-X400 Opdrachtenlijst - Pagina 5

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Timing Chart

As VISCA command processing can only be

carried out a maximum of one time in a Vertical

(V) cycle, it takes maximum 4V-cycle time for an

ACK/Completion to be returned.

If the Command and ACK/Completion

communication time is shorter than 1V-cycle

time, a command can be received at every 1V

cycle.

From this point, if two or more commands are to

be sent successively, wait for a reply command

(an ACK or error message for a general

command, and an inquiry packet for an inquiry

command) of the previous command to be

received before sending the next command.

1V=

16.7 msec (1080/59.94p, 1080/59.94i, 720/

59.94p),

20 msec (1080/50p, 1080/50i, 720/50p),

33.4 msec (2160/29.97p*),

40 msec (2160/25p*),

41.7 msec (1080/23.98p, 2160/23.98p*)

* For BRC-X400/X401 only, or only when the 4K option is applied

General commands

Within 4V

Inquiry commands

Within 4V

Command and inquiry

• Command

Sends operational commands to the unit.

• Inquiry

Used for inquiring about the current state of

the unit.

Command/Inquiry Packet

8X QQ RR ... FF

QQ: Command/Inquiry (01=Command, 09=Inquiry)

RR: Category Code (00=Interface, 04=camera, 06=Pan/Tilter)

X = 1 to 7: Address of the unit (Locked to "X = 1" for VISCA over

IP)

For actual values to be sent, see Command Lists

or Inquiry Command Lists.

Responses for commands and inquiries

• ACK message

• Completion message

ACK

Completion (Commands)

Completion (Inquiries)

• Error message

Message length error

Syntax Error

Command buffer full

Command canceled

No socket (to be canceled)

Command not executable

16 Bytes

Socket number

When command messages are sent to the unit, it

is normal to send the next command message

after receiving the completion message or error

message. However, to deal with advanced uses,

the unit has two sets of buffers (memories) for

commands, so that up to two commands

including the commands currently being

executed can be received. (There is a wait longer

than a 1V cycle between commands.) However,

depending on the command, it may be

necessary to wait until the first command is

completed due to system reasons. When the unit

receives commands, it notifies which command

buffer was used using the socket number of ACK

message. As the completion message or error

message also has a socket number, it indicates

which command has ended. Even when two

command buffers are being used, the unit

management command and inquiry messages

can be executed.

Returned by the unit when it receives a

command. No ACK message is returned for an

inquiry.

Returned by the unit when execution of

commands or inquiries is completed. In the

case of inquiry commands, reply data for the

inquiry is contained after the 3rd byte of the

packet. In the case of commands or inquiries

that do not use sockets, the socket number will

contain 0.

Y = 9 to F: Address of the unit + 8 (Locked to "Y = 9" for VISCA

over IP)

Z = socket number

When a command or inquiry command could

not be executed or failed, an error message is

returned instead of a completion message.

Y = 9 to F: Address of the unit + 8 (Locked to "Y = 9" for VISCA

over IP)

Z = socket number

Reply Packet

Y0 4Z FF

Y0 5Z FF

Y0 5Z ... FF

Error Packet

Y0 6Z 01 FF

Y0 6Z 02 FF

Y0 6Z 03 FF

Y0 6Z 04 FF

Y0 6Z 05 FF

Y0 6Z 41 FF