Sony EVID70/W Technical Manual - Page 33
Command and inquiry, Responses for commands and inquiries, Socket number, Command execution cancel - evi d70 w
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Command List Command and inquiry ● Command Sends operational commands to the EVI-D70/P. ● Inquiry Used for inquiring about the current state of the EVI-D70/P. 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: EVI-D70/P address Responses for commands and inquiries ● ACK message Returned by the EVI-D70/P when it receives a command. No ACK message is returned for inquiries. ● Completion message Returned by the EVI-D70/P 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 Ack X0 4Y FF Completion (commands) X0 5Y FF Completion (Inquiries) X0 5Y ... FF X = 9 to F: EVI-D70/P address + 8 Note Y = socket number Y = socket number Y = socket number ● Error message When a command or inquiry command could not be executed or failed, an error message is returned instead of the completion message. Socket number When command messages are sent to the EVI-D70/P, 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 EVI-D70/P has two buffers (memories) for commands, so that up to two commands including the commands currently being executed can be received. When the EVI-D70/P 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 EVI-D70/P 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: EVI-D70/P 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. Error Packet Description X0 6Y 01 FF Message length error (>14 bytes) 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: EVI-D70/P address + 8, Y = socket number 33