Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual page 1031

Serial Communications Instructions
992
00001 A39205
RS-232C Port Send
Ready Flag
00002 A39206
RS-232C Port Receive
Ready Flag
Upper byte
15 12 11 8
S: D00010
4 0
D00011
4 E
15 12 11 8
C: D00020
0 0
Serial Port Specifier
#0: CPU Unit's built-in RS-232C port
Always #0.
@TXD
S D00010
C D00020
N &3
@RXD
D00100
D00020
A393
RS-232C Port
Reception Counter
Lower byte
7 4 3 0
Sent
5 3
0 0
7 4 3 0
0 0
Byte Order
#0: Most significant bytes first
RS and ER Signal Control
#0: No RS and ER signal control .
Section 3-24
@ G L
40 53 4E ED
Three bytes