Sony EVl-330V Service Manual page 79

Responses to Commands and Inquiries.
ACK message:
Returned by EVl-330V/331V when it has received a command
Completion message: Returned by EVl-330V/33IV when it has completed execution of a command
or inquiry inspection for an inquiry instruction, the response data is from the 3rd byte on of the message
k oac et.
Reply Packet Note
Ack X04YFF Y =socket number
Completion (commands) XOSYFF Y =socket number
Completion (Inquiries)
XOSY ... FF Y =socket number
X=9 toF: EVI-330V/331Vaddress+ 8
Error message:
The EVI-330V/33IV returnes an error message instead of a completeion message when
it cannot execute a command or inquiry instruction or when execution fails.
Error Packet Descriotion
X06Y01 FF Message length error(> l 4bytes)
X06Y02 FF Syntax Error
XOuY03 FF Command buffer full
X06Y04FF Command cancelled
X06Y05 FF No socket ( to be cancelled)
X06Y 41 FF Timeout
X06Y44FF Camera mode (attempted VCR command)
X = 1 to 7 : EVI-3 30V /3 31 V address, Y = socket number
Socket Number
When a command message is sent to a EVI-330V /331 V, the controller usually waits for the completion
message or error message from that EVI-330V/33IV before sending the next message. However, in
order
to provide higher level usage, the EVI-330V/33IV has two command buffers (memories) so it can receive
up to two commands (including the one it is executing) at a time. When the EVI-330V/33IV receives a
command, it sets the socket number in the ACK message to tell the controller which command buffer is
used.
Since this socket number is also included in the completion message or error message, the controller can
see which command was completed. Even when the EVI-330V/331 V is using both commands and
inquiries, no ACK message is returned, but rather a completion message with Socket Number O is returned.
Command Execution. Stop
To cancel a command that you have already sent, send the IF _Clear cammand (see page 8). To cancel just
one cammand when you have already sent two, use a cancel message.
Cancel Packet Note
Cancel 8X 2Y FF Y=sockt number
X
= 1 to 7 : EVI-330V /331 V address, Y = socket number
8-5