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9. RS-232C SERIAL INTERFACE
The scale is a data circuit-terminating equipment (DCE). Connect the scale to a data
terminal equipment (DTE) such as a personal computer and external devices using a
D-Sub 9-pin straight through cable.
The RS-232C serial interface has the following four modes.
Stream mode
Outputs data continuously.
Key mode
Outputs data when the PRINT key is pressed.
Auto-print mode
Outputs data when the auto-print conditions are met.
Command mode
Controls the scale using commands from a personal
computer.
Set the parameters of the data output mode (
prt
) and data format (
bps
and
btpr
), as necessary.
Windows Communication Tools Software (WinCT) to communicate with a
personal computer is provided as freeware. Visit the A&D website to download
WinCT.
9-1. Interface specifications
Transmission system
EIA RS-232C
Transmission form
Asynchronous, bi-directional, half-duplex
Data format
Baud rate:
1200, 2400, 4800, 9600 bps
Data bits:
7 bits + parity 1 bit (even or odd)
or 8 bits (non parity)
Start
bit: 1
bit
Stop
bit: 1
bit
Code:
ASCII
Terminator:
C
R
L
F
(C
R
: 0Dh, L
F
: 0Ah)
LSB
0
1
2
3
4
5
MSB
6
Stop bit
Parity bit
Data bits
Start bit
1 (-15V to -5V)
0 (5V to 15V)
