Euromag EUROSONIC 2000 HH, Руководство пользователя

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EUROSONIC 2000 HH
return +10m3!F7(CR)(LF). The ‘!’ acts as
the starter of the check sum (F7) which is obtained by
adding up the string, 2BH+ 31H+ 32H+ 33H+ 34H+
35H+ 36H+ 37H+ 45H+ 2BH+ 30H+ 6DH+ 33H+
20H = (2) F7H.
Please note that it is allowed to not have data entry
or to have SPACES (20H) character before the ‘!’
character.
2) Prefix W
The prefix W is used for networking commands. The
format of a networking command is:
W + IDN address basic command.
The IDN address should have a value between 0 and
65534, except 13(0DH), 10 (0AH), 42(2AH,*), 38(26H, &).
For example, if you want to visit the instantaneous flow
velocity of device IDN=12345, the following command
should be sent to this device: W12345DV(CR). The
corresponding binary code is 57H, 31H, 32H, 33H,
34H, 35H, 44H, 56H, 0DH.
3) Prefix N
The prefix N is a single byte IDN network address, not
recommended in a new design.
4) Command binder &
The & command binder or 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 we want device IDN=4321 to
return the flow rate, velocity and POS totalizer value
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)
6.3 THE M COMMAND AND THE ASCII CODES
The protocol provides the capability of virtual key-
pressing. A remote RS-232C terminal can send an
‘M’ command along with a key code to simulate the
scenario that the key is pressed through the keypad
of the flow meter. This functionality allows the user
to operate the flow meter in the office far away from
the testing site.
For example, the command “M1” is sent to the flow
meter through the RS-232C link, the flow meter will
treat the command as if the user has pressed the
key through the keypad.
The ASCII codes and corresponding key values of the
keypad keys are listed in the following table.
Key Hexadecimal Decimal ASCII
Key Code Key Code 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
38H 56 8
39H 57 9
3AH 58 :
3BH, 0BH 59 ;
3CH,0CH 60 <
3DH,0DH 61 =
3EH 62 >
3FH 63 ?