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403
Serial Communications
Section 8-3
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-EL/EM PLCs.
MAC Address:
01234567890A
00
NC
02
04
06
08
10
00
02
04
06
08
10
01
COM
03
05
07
09
11
01
03
05
07
09
11
BKUP
ERR/ALM
LNK/ACT
SYSMAC
CP1L
POWER
RUN
INH
1
00
01
02
03
04
06
00
01
03
04
06
COM
02
COM
05
07
COM
COM(V+)
05
07
ANALOG INPUT
V1+ V2+ COM
2
CP1L-EL/EM 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-EL20DR-D
Страница 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
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Страница 10: ...x...
Страница 22: ...xxii...
Страница 34: ...xxxiv Software Licenses and Copyrights 7...
Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Страница 666: ...632 Trouble Shooting Section 11 7...
Страница 696: ...662 Standard Models Appendix A...
Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Страница 844: ...810 Ethernet Specifications Appendix K...
Страница 851: ...Index 817 work words 118 write protection 447...
Страница 852: ...818 Index...
Страница 854: ...820 Revision History...
Страница 855: ......