3. Instructions
860
CS/CJ/NSJ Series Instructions Reference Manual (W474)
RXD
Applicable Program Areas
Operands
C: Control Word
z Operand Specifications
Instruction Mnemonic Variations
Function
code
Function
RECEIVE RXD @RXD 235
Reads the specified number of bytes of data from
the CPU Unit's built-in RS-232C port or one of the
Serial Communications Board's serial ports. (The
Serial Communications Board must be Ver. 1.2 or
later).
Symbol
RXD
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or
transition programs
Usage OK OK OK OK OK OK
Operand Description Data type Size
D First destination word UINT Variable
C Control word UINT 1
N Number of bytes to store 0000 to 0100 hex (0 to 256 decimal) UINT 1
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers
TK CF
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
D
OK OK OK OK OK OK OK OK OK OK
--- ---
--- OK --- --- --- ---C
OK OK
N
RXD(235)
D
C
N
D: First destination word
C: Control word
N: Number of bytes to store
0000 to 0100 hex (0 to 256 decimal)
C
8
12
34
15
07
11
Byte order
0 Hex: Most significant byte to least significant byte
1 Hex: Lest significant byte to most significant byte
CS and DR signal monitoring
0: No CS and DR signal monitoring
1: CS signal monitoring
2: DR signal monitoring
3: CS and DR signal monitoring.
Always 0
Serial port specifier
0: CPU Unit's RS-232C port
1: Serial Communications Board port 1
2: Serial Communications Board port 2
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