FDT-25 Handheld Ultrasonic Flowmeter 31
(2) Prefix W
The prefix W should be used in the network environment. The usage format is W + digit string
which stands for the IDN + basic command.
The digit string should have a value between 0 and 65534 except 13(0DH), 10 (0AH), 42(2AH,*),
38(26H, &).
For example, if the IDN－12345 instrument is addressed and returning the velocity of that
instrument is requested, the command will be W12345DV(CR).
(3) Prefix N
The prefix N is a single byte IDN network prefix, not recommended in a new design. It is
reserved only for the purpose of the compatibility with the former versions
(4) Command Connector &
The & command connector can connect up to 6 basic commands to form a longer command so
that it will make the programming much easier.
For example, assume that the measurement of an instrument with IDN－4321 are going to be
returned, and (then) all the following 3 values--- (1) flow rate (2) velocity (3)POS totalizer---will
be returned simultaneously. The combined command would be W4321DQD&DV&DI+(CR),
and the result would be:
+1.234567E+12m3/d(CR)
+3.1235926E+00m/s(CR)
+1234567E+0m3(CR)
§6.4 Codes for the Keypad
The codes for the keypad should be used when the instrument is connected with other terminals
that operate the instrument by transmitting the
‘M’
command along with the keypad code. By this
function, remote operation of this instrument can be realized, even via the Internet.
Hexadecimal
Key code
Decimal
Key code
ASCII
Code
30H 48 0
31H 49 1
32H 50 2
33H 51 3
34H 52 4
35H 53 5
36H 54 6
37H 55 7
Hexadecimal
Key code
Decimal
Key code
ASCII
Code
38H 56 8
39H 57 9
3AH 58 :
3BH,0BH 59 ;
3CH,0CH 60 <
3DH,0DH 61
－
3EH 62 >
3FH 63 ?
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