Tactical TFM VT-222, User Manual

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TFM VT-222 Vortex Flowmeter User Manual
1.3.2 Function 04(Read Input Register) example
Example: To read total flow (assuming its current value is 100.0), the corresponding register starting
address: 16394 (0x400A in hexadecimal). Note: 100 is 42C80000 in IEEE 754 ABCD float
Request frame:
Address Function Code Register Address Register Count CRC Check
0x01 0x04 0x40,0x0A 0x00,0x02 0x50,0xF9
The correct response frame
：
Address Function Code Register Address Register Count CRC Check
0x01 0x04 0x40 0x00,0x02 0x50,0xF9
1.3.3 Function Code 16(Write Holding Registers) example
Example: Set the upper range value to 100.0, 9 0x42,0xC8,0x00,0x00) at register address is:
8204 (0x200C in hexadecimal) Note:100 is 42C80000 in IEEE 754 ABCD float
Request frame:
Address Function Code Register Address Register
Count
Data
Length
Data.. Writing100 CRC Check
0x01 0x10 0x20,0x0C 0x00,0x02 0x04 0x42,0xC8,x00,0x00 0x7F,0x1C
Correct response frame
：
2 Register Description
2.1 Input Registers Table (Variables)
Register
Address
(Dec/Hex)
Parameter Name
Access
Type
Data
Lengt
h
(word)
Data
Type
Description
16386/x4002 Percentage R 2 float
16388/x4004
Instantaneous Flow R 2 float
Register 0x021C stores the unit
of instantaneous flow
16392/x4008
Vortex Frequency
R 2 float Raw Sensor output frequency
16394/x400A
Total Flow
R 2 float
In Units of Register 8221/0x201D for
total flow Unit index
16396/x400C
Overflows Number
of Total
R 2 float
Each integer represents 10 million
counts of the overflow of the totalizer
16404/x4014
Signal Gain R 2 float
16412/x401C
Signal Channel R 1
U8
AMP CHANNEL 1 Unknown
AMP CHANNEL 2 FOR LIQUID
ANM CHANNEL 3 FOR GAS
16417/x4021
Current R 2 float mA
16419/x4023
Pressure R 2 float
kPa Gage
TFM VT-222 Vortex Flowmeter Quick Manual Rev 10f page 22 of 30