Data Format

Address

Funtion

Data

CRC

8bit

8bit

n*2*8 bit

16bit

Single Frame Format

The default baud rate is 19200, with 1 start bit, 8 data bits, 1 stop bits, and no parity bit.
The address of Pressure Switch can be adjusted from 1 to 247, with a default value of 1 (hexadecimal 01H).

Function

Code

03H: Read Multiple Registers               04H:Read the air pressure value
06H: Write Single Register                   10H: Write Multiple Registers

Register Address Description:

Address

Register
pointing

Value

Corresponding Pressure
Switch
Ontology settings

Read
/write

High
pressure

Low pressure

0001H

Pressure value

- 101~1000
corresponding to
- 0.101~1.000MPa

- 1013~1000
corresponding to
- 101.3kPa~100kPa

NC

R

0010H

OUT target value

- 100~1000
corresponding to
- 0. 100~1.000 MPa

- 1010~1010kPa
corresponding to
- 101.0~101.0kPa

Run mode:
P- 1

R/W

0011H

OUT1 target value upper
limit value

out1_down_value~1000
corresponding to
out1_down_value~1.000MP

out1_down_value~1010
corresponding to
out1_down_value~101.0kPa

Run mode:
Hi- 1

R /W

0012H

OUT1 target value lower
limit value

- 100~out1_up_value
corresponding to
- 0.100MPa~out1_up_value

- 1010~out1_up_value
corresponding to
- 101.0kPa~out1_up_value

Run mode:
LO -1

R/W

0013H

OUT1 output mode

0~2Corresponding
to
EASY,HYS,WCMP

0~2Corresponding
to
EASY,HYS,WCMP

MENU mode:
OUT1

R/W

0014H

Display color settings

0~3Corresponding
to
R_ON,G_ON,RED,GREEN

0~3Corresponding
to
R_ON,G_ON,RED,GREEN

MENU mode:
COLO

R/W

0015H

Unit Setting Value

0~4Corresponding
to
MPA ,KPA ,KGF,BAR,PSI

1~6Corresponding to MPA,KPA
KGF ,BAR ，PSI
,MMHG ,INHG

MENU mode:
UNIT

R/W

0016H

Normally open and

normally closed
setting value

0~1Corresponding
to
NO,NC

0~1Corresponding
to
NO,NC

MENU mode:
no.nc

R/W

0017H

Switching output status

0~1Corresponding
to
OFF，ON

0~1Corresponding
to
OFF，ON

Switching output
status

R

0020H

Reset Settings

Writing 1 is the display
reset operation
When the barometer is connected to the
atmosphere

Writing 1 is the display
reset operation
When the barometer is connected to the
atmosphere

Long press the up and down
keys for 3 seconds

W

InstruInstructions for changing the address of Pressure Switch:

1. Press the MODE key for 2 seconds to enter the MENU setting menu. Press the MODE key until the Addr menu appears, and adjust the address using the up and down keys.

2. Press the MODE key for 2 seconds to enter the MENU setting menu. Press the MODE key until the BAUD menu appears, and adjust the baud rate through the up and down keys, with 9600、19200、38400、115200 adjustable.

3. Press the MODE key for 2 seconds to enter the MENU setting menu. Press the MODE key until the Sbit menu appears, and adjust the Stop bit through the up and down keys, with1、2 adjustable.

4. Press the MODE key for 2 seconds to enter the MENU setting menu. Press the MODE key until the EocH menu appears, and adjust the Verification code through the up and down keys, with NONE、ODD or E_EN adjustable.