![background image](http://html1.mh-extra.com/html/omron/cp1l-l14d-series/cp1l-l14d-series_operation-manual_742090098.webp)
65
CP1L CPU Unit Operation
Section 2-3
Routing Tables
Tables specifying the communications paths from the Communications Units
on the local PLC to remote PLCs connected on other networks must be regis-
tered in all the CPU Units in network PLCs to send and receive data between
networks. These tables are called the routing tables. The routing tables con-
sist of the relay network table and local network table.
Routing tables are created from the CX-Programmer or Support Software for
Communications Units (e.g., CX-Integrator) and then transferred to each CPU
Unit.
Remote Network Table
The remote network tables lists the node number and network address of the
first relay node that must be passed through to reach any remote network to
which the PLC is not directly connected. Once the routing tables have been
registered, any remote network can be reached by passing through relay
nodes.
Local Network Table
The local network table contains the unit number and network address of all
Communications Units that are part of the local PLC.
Built-in Flash Memory
Flash memory is built into the CP1L CPU Units. Data in the following areas is
automatically backed up to the flash memory whenever it is written in any way
other than by instructions in the user program, e.g., when the CX-Programmer
or PT is used to transfer or edit data, edit the program online, or transfer data
from a Memory Cassette.
• User program area
• Parameter area (PLC Setup and routing tables)
The next time the power supply is turned ON, the data in the built-in flash
memory is automatically transferred to user memory (i.e., the user program
area and parameter area).
It is also possible to save data from data areas in I/O memory in the built-in
flash memory using operations from the CX-Programmer.
The symbol table, comment file, and program index file can be stored in the
comment memory in flash memory. When the program is transferred from the
CX-Programmer to the CPU Unit, function block program information is also
stored automatically in flash memory.
Note
The BKUP indicator on the front of the CPU Unit will light whenever the built-in
flash memory is being written or the Memory Cassette is being accessed.
3
N
3
M
PLC 1
PLC 2
PLC 3
PLC 4
3
1
2
n
Node M
Unit number n
Network 1
Network 2
Network 3
Node N
Relay Network Table for PLC 1
Relay Network Table for PLC 2
Local Network Table for PLC 3
Remote
network
Relay
network
Relay
node
Remote
network
Relay
network
Relay
node
Local
network
Unit
number
Содержание CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...