35
Circuit diagram
Data format
S T
,
+ 0
0
0
0
0
.
0
0
_
k
g C
R
L
F
Header Data Unit Terminator
There are 4 headers for the weighing data.
ST:
Stable weighing data
QT:
Stable counting data
US: Unstable weighing data
OL:
Out of weighing range
The data consists of 9 characters including the polarity and decimal point.
There are 5 units.
_ k g: Weighing mode “kg”
_ _ g: Weighing mode “g”
_ l b: Weighing mode “lb”
_ o z: Weighing mode “oz”
_ PC: Counting mode “pcs”
As a terminator,
C
R
L
F
is always output.
SW
is designed as DCE (Data Communication Equipment).
1 Relay output LOLO
2 Relay output LO
3 Relay output OK
4 Relay output HI
5 Relay output HIHI
6 Relay common COM
Solid sate relay
SW inside
LOLO
LO
OK
HI
HIHI
1 Receive data RXD
2 Transmit data TXD
3 Data set ready DSR
4 Signal ground SG
5 Shield SHLD