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1007
Serial Communications Instructions
Section 3-24
Description
TXDU(256) reads N bytes of data from words S to S+(N
÷
2)–1 and outputs the
raw data in no-protocol mode from the Serial Communications Unit with the
unit address specified in bits 0 to 7 of C+1, through the port specified with bits
8 to 11 of C+1. The logical port number can be set to any value between 0
and 7 and is specified with bits 12 to 15 of C+1.
The start and end codes specified for no-protocol mode in the allocated DM
Setup Area are added to the data before the data is output. Up to 259 bytes
can be sent, including the send data (N = 256 bytes max.), the start code, and
the end code.
Data can be sent only when the Communications Port Enabled Flag for the
specified logical port (A20200 to A20207 for ports 0 to 7) is ON and the TXDU
Instruction Executing Flag (in the allocated DM Setup Area) is OFF.
Note The logical port number can be allocated automatically by setting bits 12 to 15
of C+1 to F. For details, refer to Automatic Allocation of Communications Ports
on page 1032.
EM Area with bank
En_00000 to
En_32767
(n = 0 to C)
En_00000 to
En_32766
(n = 0 to C)
En_00000 to
En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants
---
Specified values
only
#0000 to #0100
(binary) or &0 to
&256 (decimal)
Data Registers
---
---
DR0 to DR15
Index Registers
---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area
S
C
D
Summary of Contents for SYSMAC CS Series
Page 2: ......
Page 4: ...iv ...
Page 30: ...xxx ...
Page 186: ...146 List of Instructions by Function Code Section 2 4 ...
Page 1320: ...1280 Model Conversion Instructions Unit Ver 3 0 or Later Section 3 35 ...
Page 1390: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...
Page 1391: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits ...
Page 1392: ...1352 ASCII Code Table Appendix A ...
Page 1404: ...1364 Revision History ...