Message Structure; Start Character; Device Address; Command - Comtech EF Data DT-4572 Installation And Operation Manual

DT4572 X-Band Down Converter
Remote Control
B.5 M
ESSAGE
The structure of either a Command , Response or Error Message is as follows:

Start Character.

Device Address.

Command or Response.
End of Message String.
B.5.1 S C
TART HARACTER
The Start Character begins each message:
Example:
B.5.2 D A
EVICE DDRESS
The Device Address consists of a Physical Address or a Physical Address and an
appended Virtual Address. For this document DEV is used for the generic case
examples.
Example:
B.5.3 C
OMMAND
A Command is a variable length character string beginning with a / and containing either
an instruction or an instruction and data for a converter to act upon. If data is passed by
command it is appended to the instruction by an underscore( _ ). If data is retrieved by
command underscore follows the instruction flagging the converter to supply data in a
response. In this document /COM is used for the generic case examples.
Example:
Example:
B.5.4 C
ONFIRMATION
A confirmation will change the start character, and echo the Device Address and
Command. Any requested data will be appended to the Command.
Example:
S
TRUCTURE
< Start of a user Command.
> Start of a converter response.
<3V12
<DEV/COM_xxx'cr' Sends data to a converter.
<DEV/COM_'cr'
R
ESPONSE
>DEV/COM_xxx'cr''lf']
Requests information from a converter.
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