Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 1052

Serial Communications Instructions
A20203
000000
Communications Port
Enabled Flag
C+0: D00200
C+1: D00201
1012
155905
TXDU
D00100
S
TXDU Instruction
Executing Flag
D00200
C
N
15 12 11 8 7
0 0 0
Always 00
15 12 11 8 7
3 1 1
Serial port number
1: Port 1
Port number specifier
3: Logical port 3
Note:
The serial port's unit address can be specified directly by setting the serial port number to 0 and
setting the Serial Communications Unit's unit address to the serial port's unit address.
(Set the unit address to 80 hex + 4 x unit number for port 1 or 81 hex + 4 x unit number for port 2.)
15 12 11 8 7 4 3 0
C+1: 3 0 8 8
Serial Communications Unit's unit address
88 hex = 80 hex + 4 x unit number
Serial port number
0: Specify port directly.
Port number specifier
3: Logical port 3
Most signifi- Least signif-
cant bytes icant bytes
15 8 7
S: D00100
3 4 1
D00101 C D A
D00102 E
Example allocated DM Setup Area settings:
Start code and end code values
15 12 11 8 7
D30204
0 2 0
Start code
(02 hex)
Start code and end code specifiers
15 12 11 8 7
D30205: 1 1
End code specifier
(1: Use end code.)
Start code specifier
(1: Use start code.)
&5
4 3 0
1
Byte order
1: Least significant bytes first
RS and ER signal control
0: No RS and ER signal control
4 3 0
2
Serial Communications Unit's unit address (Unit
address as CPU Bus Unit)
12 hex = Unit number + 10 hex
0
2
B
F
Transfer order 1 2 3 4 A B C D E F
In this example, a start and end code have been
specified in the allocated DM Setup Area.
4 3 0
3
ST 12 34
End code
ST: Start code (e.g., 02 hex)
(03 hex)
ED: End code (e.g., 03 hex)
4 3 0
Section 3-24
5 bytes
AB CD EF ED
Data sent.