Address:
|
S/N. |
Holding Register |
Access Address (Hex/Decimal) |
Definition |
|
1 |
41001 |
0x03E8 / 1000 |
Mass Flow |
|
2 |
41003 |
0x03EA / 1002 |
Volume Flow |
|
3 |
41005 |
0x03EC / 1004 |
Total Mass |
|
4 |
41007 |
0x03EE / 1006 |
Total Volume |
|
5 |
41009 |
0x03F0 / 1008 |
Density |
|
6 |
41011 |
0x03F2 / 1010 |
Temperature |
|
7 |
41013 |
0x03F4 / 1012 |
Pipeline Vibration Frequency |
|
8 |
41015 |
0x03F6 / 1014 |
Module |
|
9 |
41017 |
0x03F8 / 1016 |
S/N |
|
10 |
41019 |
0x03FA / 1018 |
Flow Unit |
|
11 |
41021 |
0x03FC / 1020 |
Density Unit |
|
12 |
41023 |
0x03FE / 1022 |
Range |
|
13 |
41025 |
0x0400 / 1024 |
Decimal Places |
|
14 |
41027 |
0x0402 / 1026 |
Tiny Signal Cut Ratio |
|
15 |
41029 |
0x0404 / 1028 |
Display Refresh Time |
|
16 |
41031 |
0x0406 / 1030 |
Internal Mass Flow Meter Parameters |
|
17 |
41033 |
0x0408 / 1032 |
Internal Mass Flow Meter Parameters |
|
18 |
41035 |
0x040A / 1034 |
Internal Mass Flow Meter Parameters |
|
19 |
41037 |
0x040C / 1036 |
Measured Medium |
|
20 |
41039 |
0x040E / 1038 |
Current Output Selection |
|
21 |
41041 |
0x0410 / 1040 |
Input Password |
|
22–36 |
41043–41071 |
0x0412–0x042E / 1042–1070 |
Internal Mass Flow Meter Parameters |
Note:
Each holding register is 4 bytes (2 consecutive registers) and occupies two addresses (low address). Registers with a background in the table are read-only; write operations are invalid.
The address 0x41049 is the total data release register. Writing “0” to this address will execute the release operation. Reading this register will return “1” (floating-point value).
The flow unit setting range is between 0 and 7 (data is transmitted as 4-byte floating-point numbers).
0 = t/h; 1 = kg/h; 2 = g/h; 3 = kg/min; 4 = g/min; 5 = m3/h; 6 = L/min; 7 = mL/min
The density unit setting range is 0–2 (data is transmitted as 4-byte floating-point numbers), representing: g/cm³, g/L, t/m³.
0 = g/cm³; 1 = g/L; 2 = t/m³
The current output selection is 0–1, representing flow and density respectively. Data is transmitted as 4-byte floating-point numbers.
The measured medium setting is 0–1, representing liquid and gas respectively. Data is transmitted as 4-byte floating-point numbers.
ModBus Communication (RTU Format)
Check Method: None
Data Bits: 8
Stop Bits: 1
Coriolis Mass Flow Meters ModBus Communication Protocol (RTU)
1. Read N Variables
Request frame from host:
Mass flow meter address + 0x03 + Register start address (2 bytes, high byte first) + Number of registers to read 2 * N (2 bytes, high byte first) + CRC check code (2 bytes, low byte first)
Response frame from flow meter:
Mass flow meter address + 0x03 + Data bytes 4 * N (1 byte) + Register data (4 * N bytes, high byte first) + CRC check code (2 bytes, low byte first)
Example:
2. Write N Variables
Request frame from host:
Mass flow meter address + Function code 0x10 + Register start address (2 bytes, high byte first) + Number of registers to read/write 2 * N (2 bytes, high byte first) + Data bytes 4 * N (1 byte) + Data to be written (4 * N bytes, high byte first) + CRC check code (2 bytes, low byte first)
Response frame from flow meter:
Mass flow meter address + Function code 0x10 + Register start address (2 bytes, high byte first) + Number of registers to read/write 2 * N (2 bytes, high byte first) + CRC check code (2 bytes, low byte first)
China Coriolis Mass Flow Meter Supplier: Silver Automation Instruments
More info: http://www.silverinstruments.com/product/flow-measurement/coriolis-mass-flow-meter.html
