Sony SRG-A40 Command List page 11

Payload type
Stores the value (Byte 0 and Byte 1) of the following table on the payload division.
Name Value (Byte 0)
VISCA command 0x01
VISCA inquiry 0x01
VISCA reply 0x01
VISCA device 0x01
setting command
Control 0x02
command
Control reply 0x02
Payload length
Stores the number of bytes (1 to 16) of data that is stored on the payload.
Example: When the payload length is 16 bytes.
Byte 2: 0x00
Byte 3: 0x10
Sequence number
The controller stores the sequence number that is added every time a message is sent. If the sequence
number reaches the limit, next value will be 0. The peripheral device saves the sequence number in the
message from the controller, and stores the sequence number of the received message corresponding
to the message sent to the controller.
Payload
Depending on the payload type, the following are stored.
• VISCA command
Stores the packet of the VISCA command.
• VISCA inquiry
Stores the packet of VISCA message.
• VISCA reply
Stores the reply for the command or inquiry (ACK message, completion message, or error message).
• VISCA device setting command
Stores the packet of the VISCA device setting command.
• Control command
The following are stored on the payload division of the control command.
Name Value
RESET 0x01
ERROR 0x0Fpp
• Controlled reply
The following are stored on the payload division of the reply for the control command.
Message Value
ACK 0x01
Value (Byte 1) Description
0x00 Stores the VISCA command.
0x10 Stores the VISCA inquiry.
0x11 Stores the reply for the VISCA command and VISCA
inquiry, or VISCA device setting command.
0x20 Stores the VISCA device setting command.
0x00 Stores the control command.
0x01 Stores the reply for the control command.
Description
Resets the sequence number to 0.
The value that was set as the sequence number is ignored.
pp=01: Abnormality in the sequence number
pp=02: Abnormality in the message (message type)
Description
Reply for RESET.
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