Omron CJ - 08-2008 - Communications Functions (Serial;Network)

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Function Tables Section 1-8
1-8-2 Communications Functions (Serial/Network)
Other Func-
tions
Allocating words in the I/O
Area by specifying the first
word allocated to a Rack.
Set the first word allocated to a Rack
by registering the I/O table from the
CX-Programmer. (Words must be allo-
cated to Racks in the order that the
Racks are connected.)
Programming
Manual
(W394)
6-7 Other
Functions
Allocating words in the I/O
Area freely by specifying
the word allocated to a slot.
Set the first word allocated to a slot by
registering the I/O tables from the CX-
Programmer.
Operation
Manual
8-5 Allocat-
ing First
Words to
Slots
Reducing input chattering
and the effects of noise.
Specify the input response times for
Basic I/O Units in the PLC Setup.
(Basic I/O Unit Input Response Time)
Programming
Manual
(W394)
6-7 Other
Functions
Purpose Protocol: Required Equipment Reference
Monitoring from
the Host Com-
puter
RS-232C or RS-422/485 Host Link:
Port in the CPU Unit or Serial Com-
munications Unit
2-5 Expanded
System Con-
figuration
Host Link communications from the
PLC
Enclose a FINS command with a
Host Link header and terminator and
issue it from the PLC as a network
communications instruction.
Network communications through
RS-232C or RS-422/485
Controller Link and Ethernet commu-
nications are possible through the
Host Link. (Enclose a FINS command
with a Host Link header and termina-
tor and issue it from the PLC as a net-
work communications instruction.)
Network Control system Controller Link:
Controller Link Unit
Information sys-
tem
Ethernet: Ethernet Unit
Connecting to a
Standard Serial
Device
Creating a simple protocol Protocol Macros:
Serial Communications Unit
High-speed data exchange
No protocol No protocol:
CPU Unit’s RS-232C port, or Protocol
Macro
Communicating
with a PT
Direct access NT Link:
Port in the CPU Unit or Serial Com-
munications Unit
Data Link
between PLCs
High capacity or free word allocation Controller Link: Controller Link Unit
Data Link between PLC and computer Controller Link:
Controller Link Unit
Message
communications
between PLCs
Normal or high capacity Controller Link: Controller Link Unit
Information system Ethernet: Ethernet Unit
Message
communications
between PLC
and computer
Control system Controller Link:
Controller Link Unit
Information system Ethernet: Ethernet Unit
Purpose Function Manual Reference