Omron CJ - INSTRUCTIONS User Manual

105
CS/CJ/NSJ Series Instructions Reference Manual (W474)
2. Summary of Instructions
2-2 Instruction Functions
2
2-2-23 Serial Communications Instructions
TRANSMIT VIA
SERIAL COMMU-
NICATIONS UNIT
TXDU
@TXDU
256
Outputs the specified number of bytes of data from the serial port of a
Serial Communications Unit (version 1.2 or later). The data is output in
no-protocol mode with the start code and end code (if any) specified in
the allocated DM Setup Area.
Output
Required
869
RECEIVE VIA
SERIAL COMMU-
NICATIONS UNIT
RXDU
@RXDU
255
Reads the specified number of bytes of data from the serial port of a
Serial Communications Unit (version 1.2 or later). The data is read in
no-protocol mode with the start code and end code (if any) specified in
the allocated DM Setup Area.
Output
Required
875
DIRECT TRANS-
MIT VIA SERIAL
COMMUNICA-
TIONS UNIT
DTXDU
@DTXDU
262
This instruction is
supported only by
CJ2M CPU Units
and CJ2H CPU
Units.
Outputs the specified number of bytes of data from the serial port of a
CJ1W-SCU22/SCU32/SCU42 Serial Communications Unit. The data is
output in no-protocol mode from the specified first word with the start
code and end code (if any) specified in the allocated DM Setup Area.
This instruction sends the data to the Serial Communications Unit as
soon as the instruction is executed to achieve high-speed data trans-
mission.
Output
Required
882
DIRECT
RECEIVE VIA
SERIAL COMMU-
NICATIONS UNIT
DRXDU
@DRXDU
261
This instruction is
supported only by
CJ2M CPU Units
and CJ2H CPU
Units.
Reads the specified number of bytes of data from the serial port of a
CJ1W-SCU22/SCU32/SCU42 Serial Communications Unit to CPU
Unit memory starting at the specified first word. The data is read in no-
protocol mode with the start code and end code (if any) specified in the
allocated DM Setup Area.
This instruction reads the data from the Serial Communications Unit as
soon as the instruction is executed to achieve high-speed data recep-
tion.
Output
Required
887
CHANGE SERIAL
PORT SETUP
STUP
@STUP
237
Changes the communications parameters of a serial port on the CPU
Unit, Serial Communications Unit (CPU Bus Unit), or Serial Communi-
cations Board. STUP(237) thus enables the protocol mode to be
changed during PLC operation.
Output
Required
895
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
Page
TXDU(256)
S
C
N
S: 1st source word
C: 1st control
word
N: Number of
bytes
0000 to 0256 BCD
RXDU(255)
D
C
N
D: 1st destination
word
C: 1st control
word
N: Number of
bytes to store
0000 to 0256 BCD
DTXDU(262)
S
C
N
S: 1st source word
C: 1st control
word
N: Number of
bytes to store
0000 to 0256 BCD
DRXDU(261)
D
C
N
D: 1st destination
word
C: 1st control
word
N: Number of
bytes to store
0000 to 0256 BCD
STUP(237)
C
S
C: Control word
(port)
S: First source
word

Omron CJ - INSTRUCTIONS Specifications

General

Brand	Omron
Model	CJ - INSTRUCTIONS
Category	Controller
Language	English