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Error Responses
When the MVC 121 Plus is unable to execute the command, it returns an error response
to the host. The error response codes and their descriptions are as follows:
Code
Description
E01
Invalid input number
E10
Invalid command
E13
Invalid value (out of range)
E14
Not valid for this configuration
E23
Firmware update failure
Although the MVC uses the same structure for SIS commands, there are two variations.
One is the global command structure documented in the Command/Response Table for
Basic SIS Commands that follows.
The second set of tables for DSP SIS commands uses the command structure outline
beginning with Command/Response Tables for DSP SIS Commands on page 36. While
using the same structure of basic SIS commands, they differ in how the software addresses
the individual processor blocks within the MVC 121 Plus.
Generally the basic SIS commands are used for global configuration such as setting a unit
name, while the Audio SIS commands provide gain, volume, and mute control in the audio
signal chain.
Command/Response Table for Basic SIS Commands
Symbol definitions
]
=
CR/LF (carriage return/line feed) (hex 0D 0A)
}
=
Carriage return (no line feed, hex 0D)
•
=
Space character
|
=
Pipe (vertical bar) character
E
=
Escape key (hex 1B)
=
=
Future capability (not currently available)
X!
=
Mix-point Input selection
1 = Mic 1 Mix-point
2 = Mic 2 Mix-point
3 = Line 3 Mix-point
X@
=
Output Volume (variable)
0 (mute) to 100 (max volume) in 1% steps
X#
=
On/Off
0 = off/mute
1 = on/unmute
X$
=
Mix-point gain values increment/
decrement
-24 to +12 dB in 1 dB steps
X^
=
Dirty status
0 = RAM has been saved to Flash (OK to power off/reset)
1 = RAM needs to be saved to Flash
X&
=
Output Volume Adjustment Range
0 (no output) to 100 (full output) in 1% steps
X*
=
Soft Limit (Hi) Value must be higher than low soft limit or device responds with E13 error.
X(
=
Soft Limit (Low) Value must be lower than high soft limit or device responds with E13 error.
X1)
=
Executive Mode
0 = Disabled / Full control
1 = Enabled / no front panel control
2 = Enabled / volume control only
MVC 121 Plus • SIS Programming and Control 31