background image

   

25

 

|

 

P a g e

5.6.3

 

Frame

 

The

 

frame

 

function

 

is

 

based

 

on

 

the

 

standard

 

Modbus

 

RTU

 

framing:

 

Start_bits

 

Address

 

Function

 

codes

 

Data

 

CRC

 

Stop_bits

 

T1

T2

T3

T4

 

8

 

bit

 

8

 

bit

 

N

 

8

 

bit

 

(20≥n≥0)

 

16

 

bit

 

T1

T2

T3

T4

 

Start_bits

:

 

4

 

periods

 

bit

 

time,

 

for

 

a

 

new

 

frame.

 

Address: 

The address can be set from 1 to 255 except for 157 (0x9d). 0 is the broadcast address. 

Function codes: 

Define the product (MF5700)'s functions/actions (slaves), either execution or response. 

Data: 

The address of the register, length of data, and the data themselves. 

CRC: 

CRC verification code. The low byte is followed by the high byte.  For example, a 16 bit 
CRC is divided into BYTE_H and BYTE_L.  In the framing, the BYTE_L will come first, then 
followed by the BYTE_H.  The last one is the STOP signal. 

Stop_bits: 

4 periods bit time, for ending the current frame. 

5.6.4

 

Function

 

codes

 

The

 

Modbus

 

function

 

codes

 

applied

 

for

 

the

 

product

 

are

 

the

 

sub

class

 

of

 

the

 

standard

 

Modbus

 

function

 

codes.

  

These

 

codes

 

are

 

used

 

to

 

set

 

or

 

read

 

the

 

registers

 

of

 

the

 

product:

 

Code

 

Name

 

Functions

 

0x03

 

Read

 

register

 

Read

 

register(s)

  

0x06

 

Set

 

single

 

register

 

Write

 

one

 

single

 

16

bit

 

register

 

0x10

 

Set

 

multiple

 

registers

 

Write

 

multiple

 

registers

 

5.6.5

 

Registers

 

The

 

product

 

(MF5700)

 

has

 

multiple

 

registers

 

available

 

for

 

the

 

assignment

 

of

 

the

 

various

 

functions.

  

With

 

these

 

functions,

 

the

 

user

 

can

 

obtain

 

the

 

data

 

from

 

the

 

products,

 

such

 

as

 

product

 

address

 

and

 

flow

 

rates

 

from

 

the

 

registers,

 

or

 

set

 

the

 

product

 

functions

 

by

 

writing

 

the

 

corresponding

 

parameters.

 

The

 

currently

 

available

 

registers

 

are

 

listed

 

in

 

the

 

following

 

table,

 

and

 

the

 

registers

 

may

 

be

 

customized

 

upon

 

contacting

 

the

 

manufacturer.

  

Where

 

R:

 

read;

 

W:

 

write

only;

 

W/R:

 

read

 

and

 

write.

 

Note:

 

At

 

the

 

time

 

of

 

shipping,

 

the

 

write

 

protection

 

function

 

is

 

enabled

 

except

 

for

 

address

 

and

 

baud

 

rate.

  

Once

 

the

 

user

 

completes

 

the

 

register

 

value

 

change,

 

the

 

write

 

protection

 

will

 

be

 

automatically

 

enabled

 

once

 

again

 

to

 

prevent

 

incidental

 

data

 

loss.

      

   

MF5700

 

User

 

Manual

   

www.ato.com

sales@ato.com

18005851519

  

Global Shipping

Содержание MF5700 Series

Страница 1: ...Gas Mass Flow Meter VC 3 Model MF5700...

Страница 2: ...anual 1 P a g e Gas Mass Flow Meter with MEMS thermal sensing technology MF5700 Series User Manual Document No 11 2021 MF2 EN Issue date 2021 11 Revision VC 3 www ato com sales ato com 18005851519 Glo...

Страница 3: ...pecified parameters Only the trained or qualified personnel shall be allowed to perform product services Be cautious for the electrical safety even it operates at a low voltage any electrical shock mi...

Страница 4: ...the measurement 16 5 5 2 MENU entry with a verified password 16 5 5 3 Set the RS485 Modbus address 17 5 5 4 Set the RS485 communication baud rate 17 5 5 5 Reset or calibrate the offset 17 5 5 6 Gas co...

Страница 5: ...1 Product selection 29 6 2 Order contact and customer support 29 7 Technical specifications 30 8 Technical notes for the product performance 31 8 1 Measurement principle 31 8 2 Precautions for the be...

Страница 6: ...n 2010 The upgrade includes much improved accuracy an additional model to cover flow range and channel size compatibility significantly extended measurement dynamic range wireless data options and val...

Страница 7: ...eck immediately for the integrity of the product as well as the power and data cable if any abnormal is identified please notify the distributor sales representative or manufacturer as soon as you can...

Страница 8: ...description Figure 3 2 MF5700 with valve Meter head rotatable Meter body LCD display MENU keys BSPP connector Flow direction Battery chamber cover Data and power port Installation screws ON OFF soleno...

Страница 9: ...ow Displays instant flow rate in L min Liters per minute or SCFH standard cubic feet per hour or m3 h cubic meters per hour Battery status Valve status The current product provides an ON OFF control v...

Страница 10: ...gnment Figure 3 4 MF5700 cable USB C 100 3 4 Mechanical dimensions Figure 3 5 MF5700 meter dimensions Wire Color Definition 1 Red Power supply 5 24 Vdc 2 Black GND ground 3 Green RS485A 4 White RS485B...

Страница 11: ...ns of the meters meters with control valves Connector G L1 L2 LV1 LV2 W1 W2 H1 H2 H3 MF5706 BSPP 61 34 95 5 123 34 25 127 28 12 5 MF5708 BSPP 3 8 81 45 110 134 45 30 134 35 15 5 MF5712 BSPP 90 50 115...

Страница 12: ...ly Flow direction should be aligned with the arrow mark on the meter body If the flowing fluid may have particles or debris a filter is strongly recommended to be installed upstream of the meter Pleas...

Страница 13: ...ters to be installed For some typical situations please follow the installation recommendation detailed in the following sketches c 2x90 degree elbow 3 D d Pipe size reduction e Pipe size expansion f...

Страница 14: ...ghted up with the proper information displayed works correctly g Slowly open the valve s if any upstream or downstream or both of the pipeline and the meter should then start to measure the flow in th...

Страница 15: ...e measured must be clean and free of particles or other foreign materials 5 2 Check the leakage Check gas leakage before any measurement If it is needed the pressurized nitrogen or air can be used for...

Страница 16: ...provides the basic functions to access the meter sensor data plot an instant flow rate chart calculate totalized or accumulated flow volume at a specific time defined by the user It allows the user t...

Страница 17: ...he Up or Down key to change the digit that flashes and press the M key to confirm Repeat this process for all 5 digits and the meter will enter into the menu setting interfaces screen Subsequently the...

Страница 18: ...There are 6 baud rates selectable depending on your system requirements 4800 9600 19200 38400 57600 and 115200 The default baud rate is 9600 Use the Up or Down key to select the desired one and press...

Страница 19: ...ding Following the above mentioned steps at the MENU setting screen use the Up or Down key to select F12 GCF Press the M key to confirm and it will open the sub MENU showing the current gas conversion...

Страница 20: ...s at the MENU setting screen use the Up or Down key to select F39 LAnG Press the M key to confirm and it will open the sub MENU showing the current language Use the Up or Down and the M confirming key...

Страница 21: ...y to select F99 qUIT and the M key to exit the MENU and return to the Main Display screen 5 5 12 Set an alarm lower instant flow rate limit This function allows the user to set the instant flow rate b...

Страница 22: ...hich indicates the task is completed Use the Up or Down key to select F99 qUIT and the M key to exit the MENU and return to the Main Display screen 5 5 14Change the default password For data safety it...

Страница 23: ...settings use the Up or Down key to select the F99 qUIT option and press the M confirming key to exit the MENU settings and return to the Main Display screen 5 5 17 Sleeping mode When the meter is powe...

Страница 24: ...23 P a g e 5 5 19MENU key sequence for the settings MF5700 User Manual www ato com sales ato com 18005851519 Global Shipping...

Страница 25: ...on The hardware layer is TIA EIA 485 A as illustrated below In this configuration the product MF5700 is a slave 5 6 2 Communication parameters The PC UART communication parameters are listed in the fo...

Страница 26: ...of the standard Modbus function codes These codes are used to set or read the registers of the product Code Name Functions 0x03 Read register Read register s 0x06 Set single register Write one single...

Страница 27: ...x00F2 40243 0x00F2 Write protection Write protection of selected parameters W 0x00FF 40256 0x00FF The detailed information of each register is described below Y enabled N disabled Flowmeter address 0x...

Страница 28: ...alue type UINT 16 Notes The air default is 1000 normally read from register 0x008B The product will disable this function with write protection once the metering gas is confirmed with the proper GCF F...

Страница 29: ...o reset or calibrate the offset write 0xAA55 to register 0x00F0 When you execute this function make sure there is NO flow in the flow channel Reset accumulated flow rate 0x00F2 Write Y Read N Descript...

Страница 30: ...isted at the end of this document For small quantities the order can be placed either through the ATO website www ATO com or the sales office For large quantities please contact the sales office distr...

Страница 31: ...no condensation RH Maximum overflow 100 200 400 SLPM Maximum flow change 15 30 60 SLPM sec Pressure loss 0 6 1 0 2 0 kPa Power supply 4 AA batteries LR6 5 24 Vdc Power consumption 60 on batteries day...

Страница 32: ...tions the calorimetric thermal sensing will guarantee a pressure and temperature independent mass flow data acquisition The MEMS technology also allows the mass production of the sensing elements that...

Страница 33: ...ean and dry If any contamination is suspected please allow experienced technical personnel to have it checked and re conditioned Do not use a foreign cleanser or other fluids to clean the flow path wh...

Страница 34: ...ilure Return to factory Large errors or unexpected flowrate Particles fluid type Check system Erroneous or large noise Vibration unstable flow Check system Valve not work Wire connection valve Return...

Страница 35: ...mages of any kind To the extent permitted by law the exclusive remedy of the user or purchaser and the limit of Siargo s liability for any and all losses injuries or damages concerning the products in...

Страница 36: ...ve been subject to working conditions beyond the technical specification as described by this manual or related datasheet published by the manufacturer 5 Any damages incurred by the incorrect usage of...

Страница 37: ...or product supports please contact customer service at the address listed below We will respond to your request in a timely fashion and will work with you toward your complete satisfaction For furthe...

Страница 38: ...5 interface in serial For further information and purchase of the evaluation kit please contact the manufacturer or the sales representative Each converter has a fixed cable that can be directly conne...

Страница 39: ...time setting Corrections Revision C 2 July 2021 Corrections Revision C 1 March 2021 The formal release of the 3rd generation products Revision C 0 Sepetember 2020 The first release of the 3rd generat...

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