Omron CV500 User Manual

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1-1 Overview
1-1-1 Communications
The Host Link System is an optimum and economical communications method
for any size of FA system. The Host Link System can incorporate one or more
host computers interconnected to one or more PCs.
A Host Link System allows a host computer to monitor the operating status and
data areas of the PCs and to control PC operation through transfers of data and
programs.
Host computer
Commands
Responses
CV-series PC
As shown in the figure above, data transfer between the host computer and the
Host Link System is normally initiated when a host computer sends a command
to a PC in the Host Link System. The PC processes each command sent by the
host computer and transmits the results to the host computer.
The user can control the PCs in the Host Link System and monitor operation with
one or more host computers. For example, on a production site, a single host
computer makes it possible to monitor and control the operation of the PCs by
transferring data and programs required for production.
Transmissions from PCs The CV500-LK201 Host Link Unit also allows a CV-series PC to send a com-
mand to a host computer, thus enabling the PC to inform the host computer of
any abnormality arising on the production line that the PC is controlling. The PC
can also communicate with the host computer to check the operating conditions
of the host computer.
Host computer
Commands
Responses
CV-series PC
Caution Transfer only uppercase letters using the host links. Lowercase text cannot be
processed.
1-1-2 Features
CV-series PCs feature a built-in host interface. With this interface, it is possible
to create a Host Link System consisting of CV-series PCs without using any op-
tional Units. When a single interface is not sufficient, however, the
CV500-LK201 Host Link Unit can be mounted to a PC Rack to connect to more
than one host computer. The system created by connecting one or more PCs to
one or more host computers via either the host interface on the CPU or a Host
Link Unit mounted to a PC Rack is called a Host Link System. The main advan-
tages of the Host Link System are described below.
Communications Use either RS-232C or RS-422 communications.
Multiple PCs Connections Up to 32 PCs can be connected to a host computer via RS-422 communications.
Host Monitoring and Control The operating status of the PCs and its memory contents can be monitored and
controlled from the host computer.
New Command System A new command mode called FINS, or CV mode, is provided in addition to the
conventional command mode used by the C-series PCs. Refer to the FINS
Command Reference Manual.
Overview Section 1-1

Omron CV500 Specifications

General

Brand	Omron
Model	CV500
Category	Controller
Language	English