Escort 3016B - Manual (Page 101)

15 Ethernet interface
Page 3
Syntax of a message unit
A message unit (for example: :REAR:SETUP 1) is made of several fields:
- Heading:
For the command messages (for example: :REAR:SETUP 1) or for the interrogation messages (for
example: :REAR ?), it is made of a character chain (simple heading) or of several chains separated
with ":" (composed heading).
A chain includes from 1 to 12 alphanumerical characters or the "_" character (code ASCII 95 in
decimal). Advisable chain length: 4 characters.
A heading chain always begins with an alphabetic character. It may be preceded by ":" (composed
heading) or end with an interrogation point "?" (interrogation message).
An interrogation message must always be followed by the termination sequence.
-Heading separator:
One or several ASCII characters (0 to 32, in decimal except 10 and 13).
-One or several pieces of data:
(for example: :SPEED 1,MM_S), alphanumerical, numerical or made of any characters or binary
bytes.
-Data separator:
a comma "," possibly followed and/or preceded by one or several "filling" characters in ASCII code
(0 to 32, in decimal except 10 and 13).
Data:
There are several types of pieces of data:
-Alphanumerical data:
1 to 12-character ASCII-coded chains that can be alphabetical (lower or upper case), numerical or
the "-" (95d).
The chain must begin with an alphabetical character.
For example, for a non-numerical parameter: S1M.
-Decimal digital data:
made of a mantissa and possibly of an exponent, and figured as a succession of ASCII-coded
characters that begin with a digit or a sign (+ or -). It can be of NR1 (integer), NR2 (decimal) or
NR3 type (with an exponent) or a combination of these three types.
- Text:
7-bit ASCII-coded character chain between quotation marks (") or apostrophes (').
For example: "Channel 1".