Preliminary manual AN 401 Plus V2 r12 25/10/12
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8
DSENET
serial protocol
NOTE: for protocol compactness it was decided to use only one character to address an instrument.
After the first ten numbers, address numbering continues with alphabet letters, thus A means 10, B means 11 and so on
until Z that means 35.
8.1
“R” Command
Command “
R
” allows to request, from a remote computer, the measure acquired by AN401
plus
within the active
operating mode. The command argument defines which measures is requested to the instrument and is independent
from the actual measurement function.
Argument of the R command is an ASCII character and may assume the following values:
Command format
@
ID
R
Index ( ind )
CR
Where:
ID
= address of the connected AN401
plus
(in case only one AN401 is connected, by sending “?” the instrument
will always reply). The identifier shall be a character in the set 0-9 or A-Z; ID can also be the character “?” if
a message is to be sent to an instrument the identifier of which is unknown.
R
= read measure command.
Index
= 1 digits numeric index indicating to AN401
plus
which measure is requested; see “Ind” column.
Note: RO means that the parameter is Read Only and cannot be modified by user.
CR = “
Carriage Return” must close every message sent to the instrument and is represented by an ASCII
character.
Ind
Prot
Parameter
Symbol
0
RO
Measured value A/D converter points
VAL_AD
1
RO
Filtered measured value A/D converter points
VAL_ADF
2
RO
Gross value in engineering units
VAL_UMEC
3
RO
Net value in engineering units
(GROSS–ZDYN)
VAL_NZDYN
4
RO
Net value in engineering units
(GROSS–TARE)
VAL_NTARE
5
RO
Peak value (only for operating mode 7) with Kg engineering units
VAL_ROTT
6
RO
Peak value (only for operating mode 7) with N engineering units
VAL_ROTTN
Example:
Measured value, in A/D converter points, is requested with @?R0CR.
Reply to command “R”
: xxRyyyyyyyy
Where:
xx
= sent command index ( Ind ):
2 digits.
R
= reply to command “
R
”:
1 digit.
Yyyyyyyy
= measured value:
8 digits.
