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Coriolis Mass Flow Meters RS 485 RTU Communication Protocol



Silver Automation Instruments is China supplier for SH-CMF Series Coriolis Mass Flow meters. Both the price and quality has its advantages. And below is information for Coriolis Mass Flowmeter RS 485 RTU Communication Protocol.


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

41043

0x0412 / 1042

Internal Mass Flow Meter Parameters

23

41045

0x0414 / 1044

Internal Mass Flow Meter Parameters

24

41047

0x0416 / 1046

Internal Mass Flow Meter Parameters

25

41049

0x0418 / 1048

Total Data Clearance

26

41051

0x041A / 1050

Internal Mass Flow Meter Parameters

27

41053

0x041C / 1052

Internal Mass Flow Meter Parameters

28

41055

0x041E / 1054

Internal Mass Flow Meter Parameters

29

41057

0x0420 / 1056

Internal Mass Flow Meter Parameters

30

41059

0x0422 / 1058

Internal Mass Flow Meter Parameters

31

41061

0x0424 / 1060

Internal Mass Flow Meter Parameters

32

41063

0x0426 / 1062

Internal Mass Flow Meter Parameters

33

41065

0x0428 / 1064

Internal Mass Flow Meter Parameters

34

41067

0x042A / 1066

Internal Mass Flow Meter Parameters

35

41069

0x042C / 1068

Internal Mass Flow Meter Parameters

36

41071

0x042E / 1070

Internal Mass Flow Meter Parameters


Attention:

Each holding register is 4 bytes (2 consecutive maintain registers), and it takes two addresses (low address). The register with a background in the tables is read-only register. The writing operation is invalid.

The address of 0x41049 is total-data clearance register. Write 0 in this address could process the clearance operation. Read the register and it will returns back to 1 (Floating point number).

The flow unit setting is 0-7 (The data will be transferred to 4-byte floating point number to transfer).

0èt/h;1èkg/h;2èg/h;3èkg/min;4èg/min;5èm3/h;6èL/min;7èml/min

The density unit setting is 0-2 (The data will be transferred to 4-byte floating point number to transfer). And it respectively stands for: g/cm3、g/L、t/m3

0è g/cm3;1èg/L;2èt/m3

The current output selection is 0-1. And it respectively stands for flow and density. The data will be transferred to 4-byte floating point number to transfer.

The measured medium setting is 0-1. And it respectively stands for liquid and gas. The data will be transferred to 4-byte floating point number to transfer.

ModBus Communication (RTU Format)

Check Method: no check

Data Bits: 8

Stop Bits: 1

Coriolis MassFlow meters ModBus Communication Protocol (RTU)

1. Read N variables

The host requested information frame:

Mass Flow Meter Address+0x03+Register’s Starting Address(2bytes,High Byte is in the front)+ Number of Register’s Reading and Writing 2*N(2bytes,High Byte is in the front)+ CRC Check Code(2bytes,Low Byte is in the front)

Response Information from the machine frame:

Mass Flow Meter Address +0x03+Bytes of Data 4*N(1字节)+ Register’s Data(4*N bytes,High Byte is in the front)+ CRC Check Code(2 bytes,Low Byte is in the front)

For Example:

2. Write N variables

The host requested information frame:

Mass Flow Meter Address +Function Code 0x10+ Register’s Starting Address(2 bytes,High Byte is in the front)+ Number of Register’s Reading and Writing 2*N(2bytes,High Byte is in the front)+ Bytes of Data 4*N(1byte)+Data waiting to be written(4*N bytes,High Byte is in the front)+ CRC Check Code(2 bytes,Low Byte is in the front)


Response Information from the machine frame:

Mass Flow Meter Address + Function Code 0x10+ Register’s Starting Address(2 bytes,High Byte is in the front)Number of Register’s Reading and Writing 2*N(2bytes,High Byte is in the front)+

(2 bytes,Low Byte is in the front)


China Coriolis Mass Flowmeter Supplier: Silver Automation Instruments

More information http://www.silverinstruments.com/product/flow-measurement/coriolis-mass-flow-meter.html




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