Overview Of Communications Commands; C-Mode Commands - Omron CJ - REFERENCE MANUAL 07-2009 Reference Manual

Overview of Communications Commands

1-1 Overview of Communications Commands
Communications Commands Addressed to CS/CJ/CP/NSJ-series Units
Communications commands

C-mode Commands

FINS Commands
1-2 C-mode Commands
Type Header
code
I/O memory RR
reading
RL
RH
RC
RG
RD
RJ
RE
2
A CS/CJ/CP-series CPU Unit or NSJ Controller can receive the following
communications commands.
C-mode commands via Host Link
FINS commands
C-mode commands are specialized Host Link communications commands.
They are issued by a host computer and sent to a CPU Unit. The devices that
can be connected for serial communications are the CPU Unit, a Serial Com-
munications Unit, and a Serial Communications Board.
FINS commands are message service communications commands. They do
not depend on a particular transmission path. They can be used for communi-
cations on various networks (Controller Link, Ethernet, etc.) and for serial
communications (Host Link). They can be issued from a CPU Unit, Special I/O
Unit, or host computer, and they can also be sent to any of these. The specific
commands that can be sent depend on the destination.
This manual explains commands sent to CS/CJ/CP-series CPU Units and
NSJ Controllers, when the commands are issued from a CPU Unit or a host
computer connected by Host Link.
Note When the source of the commands is a CPU Unit, the FINS commands are
sent by means of CMND(490)/SEND(090)/RECV(098). When the source is a
host computer, the FINS commands are issued using Host Link protocol.
The following table lists the C-mode (Host Link) commands. For details, refer
to SECTION 4 C-mode Commands.
Name
CIO AREA READ
LR AREA READ
HR AREA READ
TIMER/COUNTER PV READ
TIMER/COUNTER STATUS
READ
DM AREA READ
AR AREA READ
EM AREA READ
Via CMND(490)/SEND(090)/RECV(098)
Via Host Link
Reads the specified number of words beginning with the
designated CIO word.
Reads the specified number of words beginning with the
designated LR word.
Reads the specified number of words beginning with the
designated HR word.
Reads the specified number of words of the timer/counter
PV beginning with the designated word.
Reads the specified number of words of the timer/counter
status beginning with the designated word.
Reads the specified number of words beginning with the
designated DM word.
Reads the specified number of words beginning with the
designated AR word.
Reads the specified number of words beginning with the
designated EM word.
Section 1-1
Function