Sony EVIHD7V Product Manual (HD Color Video Camera) - Page 21

Command List Command and inquiry ● Command Sends operational commands to the EVI-HD7V/HD3V. ● Inquiry Used for inquiring about the current state of the EVI-HD7V/HD3V. 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-HD7V/HD3V address Responses for commands and inquiries ● ACK message Returned by the EVI-HD7V/HD3V when it receives a command. No ACK message is returned for inquiries. ● Completion message Returned by the EVI-HD7V/HD3V 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-HD7V/HD3V 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. 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: EVI-HD7V/HD3V address + 8, Y = socket number Socket number When command messages are sent to the EVI-HD7V/HD3V, 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-HD7V/HD3V has two buffers (memories) for commands, so that up to two commands including the commands currently being executed can be received. When the EVI-HD7V/HD3V 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-HD7V/HD3V 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. The following three commands use two sockets during execution of each command that is sent. The EVIHD7V/HD3V cannot receive other requests during execution of these commands. In addition, these commands cannot be executed during operation of other commands. • CAM_AE_Gain_Limit • SYS_Menu • CAM_Memory Recall when Limit is updated 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-HD7V/HD3V 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. 21