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17: U
SER
C
OMMUNICATION
I
NSTRUCTIONS
O
PEN
N
ET
C
ONTROLLER
U
SER
’
S
M
ANUAL
17-33
Sample Program – User Communication RXD
This example demonstrates a program to receive data from a barcode reader with a RS232C port using the user communi-
cation RXD1 (receive) instruction.
System Setup
Description of Operation
A barcode reader is used to scan barcodes of 8 numerical digits. The scanned data is sent to the
OpenNet Controller
through the RS232C port 1 and stored to data registers. The upper 8 digits of the data are stored to data register D20 and
the lower 8 digits are stored to data register D21.
Programming Special Data Register
Setting Communication Selector DIP Switch
Since this example uses the RS232C port 1, turn on communication selector DIP switch 2 to select the user communica-
tion mode. See page 17-2.
Setting Communication Parameters
Set the communication parameters to match those of the barcode reader. See page 17-3. For details of the communication
parameters of the barcode reader, see the user’s manual for the barcode reader. An example is shown below:
Special DR
Value
Description
D8200
0
RS232C por t 1 user communication mode (not modem mode)
Communication Parameters:
Baud rate
9600 bps
Data bits
7
Parity check
Even
Stop bits
1
AB
G
RS485
COM
A
B
Z
HSC
OUT
+24V
0V
POWER
RUN
ERROR
HSC OUT
123
O
N
DIP
Switch
To RS232C Por t
D-sub 25-pin Connector Pinouts
Pin
Description
1
FG
Frame Ground
2
TXD1 Transmit Data
3
RXD1 Receive Data
7
GND
Ground
Barcode Reader
Mini DIN Connector Pinouts
Description
Color
Pin
Shield
—
Cover
RTS
Request to Send
Black
1
DTR
Data Terminal Ready
Yellow
2
TXD
Transmit Data
Blue
3
RXD
Receive Data
Green
4
DSR
Data Set Ready
Brown
5
SG
Signal Ground
Gray
6
SG
Signal Ground
Red
7
NC
No Connection
White
8
To RS232C Por t 1
Communication Selector DIP Switch
Set DIP switch 2 to ON to select user com-
munication mode for RS232C por t 1.
User Communication Cable 1C
FC2A-KP1C
2.4m (7.87 ft.) long
Attach a proper connector to the open
end of the cable referring to the cable
connector pinouts shown below.
Caution
• Do not connect any wiring to the NC (no connection) pins; otherwise, the
OpenNet Controller
and
the barcode reader may not work correctly and may be damaged.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]