Visual Circuits Mantis MC, User Manual

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External Control Commands
178
Command Language Basics
The Mantis receives and responds to the LDV command structure
with the following addition: Channel Number. Because a single
Mantis replaces the equivalent of 4 DVD or 4 Laserdisc players,
the commands sent to the Mantis must be addressed to the
corresponding output. This channel number leader is designated as:
x @
where
x
equals the desired channel or output. If no channel is
designated, the Mantis interprets the command as a global
command and all channels respond. When the Mantis receives a
global command, it returns independent responses for each
channel. Should a channel experience problems, the Mantis reports
the specifics with an error code while the other healthy channels
acknowledge command completion with
<R>
.
Error Codes
The Mantis acknowledges a command by returning a <
R
>. When
the Mantis receives an invalid command or address argument, it
ignores the command and returns an error code. In the event that
the command was global, each channel reports back independently.
The following table describes the system error codes
:
Table 11: LV command Error Codes
Code Message Meaning
NAK Communication
Error
Command or address argument
cannot be parsed - invalid syntax.
E06 Missing Argument Necessary parameter is not
specified.
E11 Playlist not loaded This error will occur any time a
player control command is
received while no playlist is
loaded.
E12 Search Error Search or stop marker address
cannot be found.