Sony DVS-7300, Руководство пользователя

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A-44
Appendixes
Message Format
A PERIPHERAL II message begins with a command abbreviation, followed
by one or more fields containing the data characters listed above. Fields are
not separated by spaces. The message ends with a carriage return.
PERIPHERAL II protocol ignores the ASCII characters for line feed and
space within the body of a command.
Note
When a peripheral encounters a command with an unknown keyword, it
should ignore the reminder of the message and go on to parse the next
message.
PERIPHERAL
II
Commands
Learn
The LEARN command is sent by the master device to the peripheral device
and is used to store data needed to save the selected peripheral device’s state.
The peripheral does not acknowledge this command.
The format of the LEARN command is:
Format:Lddddddrrr<cr>
L
The LEARN command abbreviation.
dddddd The peripheral address. It is a 6-character field that is interpreted
as a hex representation of a 3-byte or 24-bit bitmask. The bits that
are set (value 1) indicate which of 24 peripherals are included in
the LEARN command.
rrr A 3-character field which is interpreted as a register number from
0 to FFF.
<cr> A carriage return.
Recall
The master device sends a RECALL command to selected peripherals prior
to the vertical interval in which the master actually performs the recall.
The amount of advance notice provided by the master may vary from one
switcher to another. The maximum amount of advance is 7.5 fields, and the
minimum is 1.5 fields. The peripheral does not respond to this command.
About PERIPHERAL
II
Protocol