VFM-60
Vortex Flowmeter
Rev1.3
Date:24/04/2020 User’s Manual
33 / 59
05
Reponse
The flow meter will take a long while to process the command. So
reponse this error code to prevent the host from processing a overtime
command.
06
Flowmeter
is
busy
To advise the host that the flowmeter is processing a command which
will takes a long time. So the host should resend the command when the
flowmeter is free.
6.7 Examples of communication
The flowmeter’s instrument Modbus address is 01, baud rate=4800 (C08=01, C09=05, C38=02).
Example 1:
Read flow rate F,F=916.49 (4 bytes float)
Host command
：
01 03 00 00 00 02 C4 0B
Flowmeter reponse
：
01 03 04
44 65 1F CE
77 78
Example 2:
Read total flow
Host command
：
01 03 00 24 00 02 84 00
Flowmeter reponse
：
01 03 04
44 9D 1E 3F
36 9D
Example 3:
Read all the value displayed on the flowmeter, including flow rate, frequency, pressure,
temperature, density, total flow ….. all together 13 value (52 bytes)
Host command
：
01 03 00 00 00 1A c4 01
Flowmeter reponse
：
01 03 34
44 65 1F CE
（
flow rate
＝
916.49
）
42 48 00 00
（
frequency
＝
50
）
00 00 00 00
（
reserved
＝
0
）
00 00 00 00
（
pressure
＝
0
）
00 00 00 00
（
temperature
＝
0
）
3F 80 00 00
（
density
＝
1.00
）
00 00 00 00
（
reserved
＝
0
）
00 00 00 00
（
reserved
）
00 00 00 00
（
reserved
）
00 00 00 00
（
reserved
）
00 00 04 E8
（
reserved
＝
1256
）
00 00 00 00
（
reserved
＝
0
）
