Omron SYSMAC CP Series, User Manual

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Appendices
A-54
CP2E CPU Unit Software User’s Manual(W614)
A-1-21 Serial Communications Instructions
Instruction Mnemonic Variations Symbol/Operand Function
TRANSMIT TXD @ Outputs the specified number of bytes of data without conversion
from the RS-2
3 2C port or RS-4 8 5 port built into the CPU Unit or
the serial Option Board according to the start code and end code
specified for no-protocol mode in the PLC Setup.
C: Control word
RECEIVE RXD @ Reads the specified number of bytes of data starting with the
specified first word from the RS-2
3 2C port or RS-4 8 5 port built
into the CPU Unit or the serial Option Board according to the start
code and end code specified for no-protocol mode in the PLC
Setup.
C: Control Word
TXD(236)
S
C
N
S : 1st source word
C : Control word
N : Number of bytes
0000 to 0100 hex
(0 to 256 decimal)
15 8 0 11 3 7 4 12
C
Byte order
0: Mo
s t s ignific a nt b yte s fir s t
1: Le as t s ignific a nt b yte s fir s t
R S a nd ER s ign a l control
0: No R S a nd ER s ign a l control
1: R S s ign a l control
2: ER s ign a l control
3: R S a nd ER s ign a l control
Alw a y s 0
S eri a l port s pecifier
1: B u ilt-in R S -232C port/ S eri a l option port 1
2: B u ilt-in R S 485 port/ S eri a l option port 2
3: S eri a l option port 1 (EX)
RXD(235)
D
C
N
D : 1st destination word
C : Control word
N : Number of bytes to store
0000 to 0100 hex
(0 to 256 decimal)
C
8 12 3 4 15 0 7 11
Byte order
0 Hex: Mo
s t s ignific a nt b yte
to le as t s ignific a nt b yte
1 Hex: Le s t s ignific a nt b yte
to mo s t s ignific a nt b yte
C S a nd DR s ign a l monitoring
0: No C S a nd DR s ign a l monitoring
1: C S s ign a l monitoring
2: DR s ign a l monitoring
3: C S a nd DR s ign a l monitoring
Alw a y s 0
S eri a l port s pecifier
1: B u ilt-in R S -232C port/ S eri a l option port 1
2: B u ilt-in R S 485 port/ S eri a l option port 2
3: S eri a l option port 1 (EX)