Pressure Sensor RS485-Modbus RTU Output

USER GUIDE FOR PRESSURE SENSOR RS485-MODBUS RTU OUTPUT



JUN-2020

This document is applied for the following products

1. Pressure Sensor RS485-Modbus RTU Output

2. Specification

Sensing Technology

Advanced PIEZO/Capacitance technology

Measuring range

Select from -1 .. + 35 bar Gage/Absolute/Sealed Gage

Over pressure protection

1.5 x Span

Accuracy

0.5% of span

Stability

< 0.3% span/year

Wetted parts

304SS/316SS

Measuring Fluids

Any fluid which is workable with materials 304SS/316SS

Working temperature

-10 .. + 80 oC

Process connection

Standard G1/4 or Others (consult factory)

RS485 output

Default address: 1, baudrate: 9600, parity: none, data: 8 bit, stop bit: 1

Power supply

9..36VDC

Consumption

5mA @ 12VDC supply

3. Product Pictures

4. Wiring

Please wiring as shown below:

Memmap resgisters:

Modbus Register (Decimal)

Modbus Register (Hex)

Function Code (Read)

Function Code (Write)

# of Registers

Range

Default

Format

Property

Comment

0

0

3

2

string

Read

2

2

3

4

string

Read

6

6

3

2

string

Read

8

8

3

1

10, 30, 60, 99

uint16

Read

Battery level, only 04 levels: 10%, 30%, 60% and 99% (full). When 10% ==> should replace the battery

9

9

3

2

0..100%

float

Read

Value from pressure process sensor. This value is parameter 1 of a wireless sensor node

11

B

3

1

uint16

Read

Hi-Byte is error code, Lo-Byte is sensor type

12

C

3

2

float

Read

Value from pressure process sensor. This value is parameter 2 of a wireless sensor node

14

E

3

1

uint8

Read

Hi-Byte is Logic status of parameter 1, Lo-Byte is Logic status of parameter 2

15

F

3

2

uint32

Read

Total time when Hi-Byte of Logic status = 1

17

11

3

2

uint32

Read

Total time when Hi-Byte of Logic status = 0

19

13

3

2

uint32

Read

Counter value when Hi-Byte of Logic status changes from 0 to 1

21

15

3

2

uint32

Read

Counter value when Hi-Byte of Logic status changes from 1 to 0

23

17

3

2

uint32

Read

Total time when Lo-Byte of Logic status = 1

25

19

3

2

uint32

Read

Total time when Lo-Byte of Logic status = 0

27

1B

3

2

uint32

Read

Counter value when Lo-Byte of Logic status changes from 0 to 1

29

1D

3

2

uint32

Read

Counter value when Lo-Byte of Logic status changes from 1 to 0

256

100

3

16

1

1-247

1

uint16

Read/Write

Modbus address of device

257

101

3

16

1

0-1

0

uint16

Read/Write

Baudrate: 0: 9600, 1: 19200

258

102

3

16

1

0-2

0

uint16

Read/Write

Parity: 0: none, 1: odd, 2: even

259

103

3

16

21

280

118

3

16

2

1

float

Read/Write

Scale value of parameter_1 = (a1 * Raw sensor value of parameter_1) + b1. For sensor value scale

282

11A

3

16

2

0

float

Read/Write

Scale value of parameter_1 = (a1 * Raw sensor value of parameter_1) + b1. For sensor value scale

284

11C

3

16

2

1

float

Read/Write

Scale value of parameter_2 = (a2 * Raw sensor value of parameter_2) + b2. For sensor value scale

286

11E

3

16

2

0

float

Read/Write

Scale value of parameter_2 = (a2 * Raw sensor value of parameter_2) + b2. For sensor value scale

288

120

3

16

2

float

Read/Write

290

122

3

16

2

float

Read/Write

High threshold value for parameter 1

292

124

3

16

2

float

Read/Write

Low threshold value for parameter 1

294

126

3

16

2

float

Read/Write

High threshold value for parameter 2

296

128

3

16

2

float

Read/Write

Low threshold value for parameter 2

5. Dimensions

6. Applications

7. Support contacts

Manufacturer

Daviteq Technologies Inc

No.11 Street 2G, Nam Hung Vuong Res., An Lac Ward, Binh Tan Dist., Ho Chi Minh City, Vietnam.Tel: +84-28-6268.2523/4 (ext.122)

Email: info@daviteq.com | www.daviteq.com