Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 848

Serial Communications Instructions
3-23-3 TRANSMIT: TXD(236)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operands
Note
Operand Specifications
Outputs the specified number of bytes of data from a serial port on a Serial
Communications Option Board mounted to the CPU Unit.
TXD(236)
S
C
N
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas Step program areas
OK OK
The contents of the control word, C, is as shown below.
15 12 11 8 7 4
C
RS and ER signal control
0 hex: No RS and ER signal control
Always 0 1 hex: RS signal control
2 hex: ER signal control
3 hex: RS and ER signal control
Serial port specifier (See note.)
1 hex: Serial port 1 (on Serial Communications
Option Board in option slot 1)
2 hex: Serial port 2 (on Serial Communications
Option Board in option slot 2)
In CP1H and CP1L M (30 or 40 I/O points) CPU Units:
1 hex: Port 1
2 or 0 hex: Port 2
In CP1L L (14 or 20 I/O points) CPU Units:
1 or 0 hex: Port 1
Area
CIO Area
Work Area
Holding Bit Area
Auxiliary Bit Area
Timer Area
Counter Area
S: First source word
C: Control word
N: Number of bytes
0000 to 0100 hex (0 to 256)
Subroutines
OK
3 0
Byte order
0 hex: Most significant bytes first
1 hex: Least significant bytes first
S
CIO 0 to CIO 6143
W0 to W511
H0 to H511
A0 to A447
A448 to A959
T0000 to T4095
C0000 to C4095
Section 3-23
TXD(236)
@TXD(236)
Not supported.
Interrupt tasks
OK
C N
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