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369
Serial Communications
Section 6-3
For example, simple (non-protocol) communications can be used to input data
from a barcode reader or output data to a printer.
The following table lists the no-protocol communication functions supported
by CP1L PLCs.
CP1L CPU Unit
TXD(236) or RXD(235)
Sending/receiving data
RS-232C or RS422A/485
Standard device with
serial communications
(e.g., barcode reader)
Transfer direction
Method
Max.
amount
of data
Frame format
Other functions
Start code
End code
Data transmission
(PLC
→
External device)
Execution of
TXD(236) in
the program
256 bytes
Yes: 00 to FF
No: None
Yes:
00 to FF or CR+LF
No: None
(The amount of data to
receive is specified
between 1 and 256 bytes
when no end code is speci-
fied.)
• Send delay time
(delay between
TXD(236) execu-
tion and sending
data from specified
port): 0 to 99,990
ms (unit: 10 ms)
• Controlling RS and
ER signals
Data reception
(External device
→
PLC)
Execution of
RXD(235) in
the program
256 bytes
Monitoring CS and
DR signals
Содержание CP1L CPU UNIT - 03-2009
Страница 1: ...Cat No W462 E1 06 CP1L CPU Unit SYSMAC CP Series CP1L L_0D_ CP1L M_0D_ OPERATION MANUAL...
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Страница 4: ...iv...
Страница 10: ...x...
Страница 22: ...xxii...
Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 70: ...36 Function Blocks Section 1 5...
Страница 584: ...550 Trouble Shooting Section 8 7...
Страница 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 630: ...596 Sample Application Section 9 12...
Страница 654: ...620 Troubleshooting Unit Errors Section 11 4...
Страница 662: ...628 Replacing User serviceable Parts Section 12 2...
Страница 668: ...634 Standard Models Appendix A...
Страница 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Страница 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Страница 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Страница 806: ...772 Index...
Страница 808: ...774 Revision History...