Escient MP-100 Benutzerhandbuch

P

AGE

 114

F

IRE

B

ALL

-MP I

NSTALLATION

 & U

SER

’

S

 G

UIDE

 - M21101-

A

PPENDIX

 D- E

XTERNAL

 C

ONTROL

 P

ROTOCOL

 

All commands will cause one of the following response numbers to be issued.  Some commands, such as database commands will also send 
back additional responses that contain more detailed information. 

COMMAND

GROUP

RESPONSE NUMBER

RESPONSE DESCRIPTION

01

01

OK

01

02

Bad Command Structure

01

03

Empty Library or Bad Range

01

04

Wrong Number of Command Arguments

01

05

Invalid Subcommand

01

06

Invalid Command

01

07

Not Available During Standby (deprecated)

01

08

Requested data not available

01

09

External control command not yet implemented (future)

01

10

Not Available at This Time

Response Format: ESCX01xx, where xx = Command response

Response 07 has been deprecated due to the new auto-on function.  Whenever a valid command is received (with two exceptions), the sys-
tem will automatically enter the “on” mode, if it is in standby.  A client may still handle response 07, but it is no longer sent from the host for any 
reason.

Response 10 will be sent when a normally valid command is sent to the host, but it cannot be processed due to the system’s mode.  For ex-
ample, a database play will not be processed while the system is in setup or options mode, autobuilding a changer, etc.  Note that a keypress 
command will never return this response, as even audio transport keys (play, stop) have alternate functions in various modes.

Unsolicited status events can be sent to report the state changes of the Escient products.  There are two currently defined message levels:  
5 - track changes, and 10 - all (including 1-second playing time updates).  Clients are registered at level 5 by default.  Clients may change 
their message level using the ESCX7002 command.  See the control commands section for instructions on how to resister and unregister for 
unsolicited status event levels.