983
Serial Communications Instructions Section 3-24
3-24-3 TRANSMIT: TXD(236)
Purpose Outputs 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).
Ladder Symbol
Variations
Applicable Program Areas
Operands The contents of the control word, C, is as shown below.
Operand Specifications
TXD(236)
S
C
N
S: First source word
C: Control word
N: Number of bytes
0000 to 0100 hex
Variations Executed Each Cycle for ON Condition TXD(236)
Executed Once for Upward Differentiation @TXD(236)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program
areas
Step program
areas
Subroutines Interrupt tasks
OK OK OK OK
15 8 011 37 412
C
Serial port specifier
0: CPU Unit's RS-232C port
1: Serial Communications
Board port 1
2: Serial Communications
Board port 2
Always 0
Byte order
0: Most significant bytes first
1: Least significant bytes first
RS and ER signal control
0: No RS and ER signal control
1: RS signal control
2: ER signal control
3: RS and ER signal control
Area S C N
CIO Area CIO 0000 to CIO 6143
Work Area W000 to W511
Holding Bit Area H000 to H511
Auxiliary Bit Area A000 to A447
A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D00000 to D32767
EM Area without bank E00000 to E32767
To Next Page
Loading...
Need help?
General
