Sony FCB-H11 Socket number, Command and inquiry, Command execution cancel, Responses for commands and inquiries

Command and inquiry

●Command

Sends operational commands to the FCB-H11.

●Inquiry

Used for inquiring about the current state of the FCB-H11.

	Command Packet	Note
Inquiry	8X QQ RR ... FF	QQ1) = Command/Inquiry,
		RR2) = category code

1)QQ = 01 (Command), 09 (Inquiry)

2)RR = 00 (Interface), 04 (camera 1), 06 (Pan/Tilter)

X = 1 to 7: FCB-H11 address

Responses for commands and inquiries

●ACK message

Returned by the FCB-H11 when it receives a command. No ACK message is returned for inquiries.

●Completion message

Returned by the FCB-H11 when execution of commands or inquiries is completed. In the case of inquiry commands, it will contain reply data for the inquiry after the 3rd byte of the packet. If the ACK message is omitted, the socket number will contain a 0.

	Reply Packet			Note
Ack	X0	4Y FF		Y = socket number
Completion (commands)	X0	5Y	FF	Y = socket number
Completion (Inquiries)	X0	5Y	... FF	Y = socket number

X = 9 to F: FCB-H11 address + 8

●Error message

When a command or inquiry command could not be executed or failed, an error message is returned instead of the completion message.

Error Packet	Description
X0 6Y 02 FF	Syntax Error
X0 6Y 03 FF	Command buffer full
X0 6Y 04 FF	Command cancelled
X0 6Y 05 FF	No socket (to be cancelled)
X0 6Y 41 FF	Command not executable

X = 9 to F: FCB-H11 address + 8, Y = socket number

Command List

Socket number

When command messages are sent to the FCB-H11, it is normal to send the next command message after waiting for the completion message or error message to return. However to deal with advanced uses, the FCB-H11 has two buffers (memories) for commands, so that up to two commands including the commands currently being executed can be received. When the FCB-H11 receives commands, it notifies the sender which command buffer was used using the socket number of the 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 at any one time, an FCB-H11 management command and some inquiry messages can be executed.

The ACK message is not returned for these commands and inquiries, and only the completion message of socket number 0 is returned.

Command execution cancel

To cancel a command which has already been sent, send the Cancel command as the next command. To cancel one of any two commands which have been sent, use the cancel message.

	Cancel Packet	Note
Cancel	8X 2Y FF	Y = socket number

X = 1 to 7: FCB-H11 address, Y = socket number

The Command canceled error message will be returned for this command, but this is not a fault. It indicates that the command has been canceled.

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