Configuring Communication Parameters - General Measure GM8802F-2 User Manual

5.1.2 Configuring parameters
After that, user can define parameters, such as baud rate, data format, communication
protocols and so on；when finished, user need dial dip switch D6 to 0（normal） and restart
power, so GM8802F-2 begin to communicate data with host computer by update parameters.
Define parameters as following fixed protocol:
Data format：7bits，1 bit stop，Even（7-E-1）
Baud rate：38400
Code：ASCII
Command：
STX Address U
Response:
STX Address U
Here:
STX —— 1bit，start character 02H
Address —— 2bit，range from 01~16（30H 31H~31H 36H）
U —— 1bit，55H
S —— 1 bit，53H
E —— 1 bit，45H
T —— 1 bit，54H
DATA1 —— 1 bit，baud rate：30H：9600；31H：19200H；32H：38400；33H：57600
DATA2 —— 1 bit，communication mode：30H：MODBUS RTU；31H:MODBUS ASCI；
32H：GM-SP1
DATA3 —— 1 bit，data format
Data format table：
Communication mode
MODBUS-RTU
GM8802-F2110101
Please dial dip switch D6 from 0（normal）to 1（defining）
to configure parameters as left drawing.
Note：User need restart power after dip switch D6 changed.
S E T DATA1
S E T
DATA3
30H
31H
32H
33H
GM8802F-2 Field Mounting Transmitter
DATA2 DATA3 DATA4 CRC
O
CR
K CRC CR
Data format
8-E-1
8-O-1
8-N-1
8-N-2
LF
LF
11