Omron CJ - INSTRUCTIONS - 2-2-23 Serial Communications Instructions

104
CS/CJ/NSJ Series Instructions Reference Manual (W474)
2. Summary of Instructions
2-2-23 Serial Communications Instructions
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
Page
PROTOCOL
MACRO
PMCR
@PMCR
260
Output
Required
847
PROTOCOL
MACRO 2
PMCR2
@PMCR2
264
(CJ2 only)
Calls and executes a communications sequence (protocol data) regis-
tered in a Serial Communications Unit.
Output
Required
898
TRANSMIT
TXD
@TXD
236
Outputs the specified number of bytes of data from the RS-232C port
built into the CPU Unit or the serial port of a Serial Communications
Board (version 1.2 or later).
Output
Required
854
RECEIVE
RXD
@RXD
235
Reads the specified number of bytes of data from the RS-232C port
built into the CPU Unit or the serial port of a Serial Communications
Board (version 1.2 or later).
Output
Required
860
PMCR(260)
C1
C2
S
R
C1: Control word 1
C2: Control word 2
S: 1st send word
R: 1st receive word
R
S
to
to
CPU Unit
C
a
ll
san
d
executes a commun
i
cat
i
ons sequence reg
i
stere
di
na
S
er
i
a
l
Communications Board (CS Series only) or Serial Communications
Unit.
Serial Communications Unit
Port
External
device
PMCR2(264)
C1
C2
S
R
I
C1: Control word 1
C2: Control word 2
S: First send word
R: First receive
word
I: First
communications
information 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)
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)