Omron CP1E CPU UNIT SOFTWARE - Connecting the Host Computer (Not Including Support Software); Overview; Flow of Operation

14 Serial Communications
14-30
CP1E CPU Unit Software User’s Manual(W480)
14-6 Connecting the Host Computer
(Not Including Support Software)
Host computers can be connected using this method only with the CP1E N/NA-type CPU Unit.
Commands are sent from a host computer (not including Support Software) to the CP1E CPU Unit to
read and write data. The serial communications mode is set to Host Link.
Precautions for Correct UsePrecautions for Correct Use
Support Software such as the CX-Programmer cannot use the Host Link protocol. Use Periph-
eral USB port instead.
14-6-1 Overview
Command flow Command type
Communica-
tions method
Configuration Application Remarks
Host computer
→ PLC
Host link
command
(C Mode)
Create frame
in the host
computer
and send the
command to
the PLC.
Receive the
response.
Directly connect the host com-
puter in a 1:1 or 1:N system.
Use this
method when
communicating
primarily from
the host com-
puter to the
PLC.
−
FINS command
(with Host Link
header and
terminator) sent.
Directly connect the host com-
puter in a 1:1 system or 1:N
system.
Use these
methods when
communicating
primarily from
the host com-
puter to PLCs
in the network.
The FINS com-
mand must be
placed between
a Host Link
header and ter-
minator and
then sent by the
host computer.
14-6-2 Flow of Operation
1
Connect the computer and CP1E CPU Unit using
RS-232C ports.
Set the PLC Setup (select Host Link for the serial
communications mode and set the communications
conditions) and transfer the PLC Setup from the
CX-Programmer to the CP1E CPU Unit.
2
Send the following commands from the host computer.
• C-mode commands
• FINS commands
3
Host link command
OR
Command
FINS
Host Link
header
Host Link
terminator
OR
Command
Communications wiring
PLC Setup
Program from host