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:
+1.12m3/d(CR)
+3.100m/s(CR)
+10m3(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.
Key
Hexadecimal
Key code
Decimal
Key code
ASCII
Code
0
30H
48
0
1
31H
49
1
2
32H
50
2
3
33H
51
3
4
34H
52
4
5
35H
53
5
6
36H
54
6
7
37H
55
7
Key
Hexadecimal
Key code
Decimal
Key code
ASCII
Code
8
38H
56
8
9
39H
57
9
－
3AH
58
:
▲
3BH,0BH
59
;
MENU
3CH,0CH
60
<
NET
3DH,0DH
61
－
▼/+
3EH
62
>
▼
/-
3FH
63
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