תצורת מד זרימת טורבינת גז Rs485 Modbus Rtu

Command 03(HEX)

Read single or multiple registers

Address

1 BYTE

01-FF

Function

1 BYTE

03

Starting Address

2 BYTE

0-FFFF

Read Numbers

2 BYTE

N(1-7D)

CRC Low

1 BYTE

CRC High

1 BYTE

Address

1  BYTE

01-FF

Function

1  BYTE

03

Byte Count

1  BYTE

N*2

Input state

N*2  BYTE

CRC Low

1 BYTE

CRC High

1 BYTE

Address

1  BYTE

01-FF

Function

1  BYTE

83

Error code

1  BYTE

01、02、03 (see note)

CRC Low

1 BYTE

CRC High

1 BYTE

Property

Address (hex)

Register length(word)

Datatype

Illustration

R

0001

2

Float

Instant flow

R

0003

2

Float

Totalized flow

R

0005

2

Float

CPU voltage, unit V

Query

01 03 0001 0004 15C9

CRC low in the front, and at the same time read instant flow and totalized flow.

Response

01 03 08

00 00 00 00 (instant flow =0)

42 84 00 00 (Totalized flow=66)

C1 86

Float high in the front, CRC low in the front