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17: U
SER
C
OMMUNICATION
I
NSTRUCTIONS
17-2
O
PEN
N
ET
C
ONTROLLER
U
SER
’
S
M
ANUAL
User Communication System Setup
Setting RS232C Port Communication Mode Selection Special Data Registers D8200 and D8300
When using the user communication mode for the RS232C port 1, set 0 to special data register D8200.
When using the user communication mode for the RS232C port 2, set 0 to special data register D8300.
When the modem mode is not used for the RS232C port 1 or 2, make sure that special data register D8200 or D8300 is set
to 0.
Setting Communication Selector DIP Switches
The communication selector DIP switch is used to select communication modes for the RS232C ports 1 and 2. When the
CPU is powered up, the selected communication modes are enabled automatically. If the communication selector DIP
switch setting is changed after the CPU is powered up, the new setting does not take effect until the communication enable
button is depressed.
Set DIP switch 2 or 3 to ON to enable the user communication mode for the RS232C port 1 or 2, respectively.
Communication Mode for RS232C Ports
User communication mode: Used for user communication instructions
Maintenance mode:
Used for communication between the CPU and
WindLDR
on computer.
Communication Enable Button
To enable the new settings of the communication selector DIP switches, press the communication enable button for 4 sec-
onds.
While the CPU is powered up, pressing the communication enable button for more than 4 seconds until the ERROR LED
blinks once makes the CPU read the settings on the communication selector DIP switches. Then the CPU updates the com-
munication mode for the RS232C ports 1 and 2. This button is useful when you want to change the communication mode
without turning power off.
IMPORTANT: Do not power up while the communication enable button is depressed, and do not press the button unless
it is necessary to do so.
Communication Selector DIP Switch
Port
ON
OFF
2
RS232C por t 1
User communication mode
Maintenance mode
3
RS232C por t 2
User communication mode
Maintenance mode
AB
G
RS485
COM
A
B
Z
HSC
OUT
+24V
0V
POWER
RUN
ERROR
HSC OUT
123
O
N
DIP
Switch
User Communication Cable 1C
FC2A-KP1C
2.4m (7.87 ft.) long
To RS232C Por t
Attach a proper connector to the
open end referring to the cable
connector pinouts shown below.
Cable Connector Pinouts
Pin
Description
AWG#
Color
1
RTS
Request to Send
28
Twisted
Black
2
DTR
Data Terminal Ready
28
Yellow
3
TXD
Transmit Data
28
Blue
4
RXD
Receive Data
28
Green
5
DSR
Data Set Ready
28
Brown
6
SG
Signal Ground
28
Gray
7
SG
Signal Ground
26
Twisted
Red
8
NC
No Connection
26
White
Cover
—
Shield
—
—
RS232C Equipment
Signal Direction
To RS232C Por t 2
To RS232C Por t 1
Communication Selector DIP Switch
Set DIP switch 2 or 3 to ON to select user communi-
cation mode for RS232C por t 1 or 2, respectively.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]