Read Operatioin - General Measure GM8802F-2 User Manual

R VR
C ZY
C ZN
C GY
C GN
O CZ
O EN/DI
O RB
O RS
5.2.1.2 Read operation
1. Read state and weight from single channel
Read command：
STX Address
Correct response：
STX Address
Here：
STX —— 1bit，start character：02H
Address —— 2bits，range from 01~16（30H 31H~31H 36H）
Channel no. —— 1bit，31H：channel no.1；32H：channel no. 2
R —— 1bit，52H
W —— 1bit，57H
State —— 2bits
High
byte
D7 D6
Fixed Fixed
None
40H
Weight —— 6bits，not including sign. Return"space space O F L space" when weight
overflow；Return"space space E R R space" when AD error；Return "space space
O F F space"when AD shut.
CRC —— 2bits，check sum
CL —— 1bit，carriage return：0DH
LF —— 1bit，line feed：0AH
14
Transmitter mode
Zero calibration
with weights
Zero calibration
without weights
Gain calibration
with weights
Gain calibration
without weights
Zeroing
operation
Start/shut AD
operation
Restart system
operation
Reset operation
Channel no.
Channel no. R
D5
0：AD
0： AD shut normal
1 1： AD start 1：AD
error
GM8802F-2 Field Mounting Transmitter
Return transmitter mode： 02F2
channel no. must be A）
The channel no. must be A
The channel no. must be A
R W T
W T State Weight
Low byte
D4 D3
0：
positive
1：
minus
CRC CR LF
CRC CR
D2 D1
0：
0：
normal
nonzero
1：
1：zero
overflow
GM8802-F2110101
（The
LF
D0
0：
unstable
1： stable