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FP-AS510 Flow Meter English Manual v2
FP-AS510 Flow Meter English Manual v2
  • ⚠Safety instructions
  • This instruction manual version is v2.0
  • Measure principle and usage scenario
  • Warranty
  • Exterior, Spec, Model
    • Device
    • Paddle set
    • T-connector
  • Install and set-up
    • Mechanism installation
    • Mechanical and electrical installation
    • Parameter setup
  • Human machine interface
    • Introduction of human machine interface
    • Monitoring screen
    • Simulation Mode
    • Data interpretation on monitoring screens
    • Password input page
    • Setup screen
  • Communication
    • OCT output
    • Analog current output (0-20mA, 4-20mA)
    • RS485 and Modbus RTU Setting
    • Modbus RTU Protocol
      • Read-only memory read instruction(04) and memory lists
      • Read-write memory list
      • Read-write memory read instruction(03)
      • Read-write memory single Register write instruction(06)
      • Read-write memory double Register write instruction(30)
  • Parameters Table
  • Alarm and description of system conditions
  • Trouble and abnormality shooting
    • Iout 4-20/0-20mA debug process
    • RS485 Debug Process
  • Certification
  • FP-AS510 Product Page
  • LORRIC English Website
  • LORRIC Integration and Application Center
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  1. Communication
  2. Modbus RTU Protocol

Read-write memory double Register write instruction(30)

PreviousRead-write memory single Register write instruction(06)NextParameters Table

Last updated 5 years ago

This instruction if for memory with 2 register length only, please refer to the .

Register location

Memory definition

Data type

0001

scale factor

float 32

0304

upper limit

float 32

0306

lower limit

float 32

030B

Total Target

float 32

0406

4mA Value

float 32

0408

20mA Value

float 32

040B

4mA Adjust

float 32

040D

20mA Adjust

float 32

Instruction example

Format of command (30) from master

Byte#

1

2

3

4

5

6

7

8

9

10

Node ID

Slave Address

Function Code

Memory address to write

Memory address to write

Write data

Write data

Write data

Write data

CRC

CRC

Example

01~FF

01

30

00

01

40

20

00

00

98

0E

Description of master command

This example will change A02 Scale Factor value to 2.50

slave address: 01(address of this flowmeter)

function code: 30(double Register write instruction)

Address of first reading register: 0001(memory address to write)

Write data: 40 20 00 00 (Change A02 Scale Factor value to 2.50)

‌CRC: 98 0E (Calculating error correcting code according to CRC algorithm)

Format of flowmeter response(30)

Byte#

1

2

3

4

5

6

7

8

9

10

Node ID

Slave Address

Function Code

Memory address to write

Memory address to write

Write data

Write data

Write data

Write data

CRC

CRC

Example 01~FF

01

30

00

01

40

20

00

00

98

0E

Description of flowmeter response example

Valid command received. It will output the same command back to master.

slave address: 01(address of this flowmeter)

function code: 30(double Register write instruction)

Address of first reading register: 0001(memory address to write)

Write data: 40 20 00 00 (Change A02 Scale Factor value to 2.50)

CRC: 98 0E (Calculating error correcting code according to CRC algorithm)

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