Application Procedure
Application Procedure
This section explains how to connect a PLC CPU Unit to a personal computer with a
USB-Serial Conversion Cable. Use the procedure below when connecting a PLC CPU
Unit and personal computer.
The Conversion Cable uses one of the computer's COM ports for communications.
When communicating with a PLC through a Conversion Cable, set the communications
port (COM port) number used by the software to the communications port (COM port)
number allocated to the Conversion Cable.
1. Connect the Cable(s).
Connect the Conversion Cable to the computer's USB port and the CPU Unit's
peripheral port or RS-232C port.
For details, refer to Connecting the Cable on page 28.
2. Install the communications driver.
The Conversion Cable's communications driver must be installed in the computer in
order for the computer to use the Conversion Cable.
For details, refer to Installing the Driver on page 29.
3. Turn ON the PLC's power.
Turn ON the PLC's power supply.
4. Make an online connection to the CPU Unit through the computer software (when
using the CX-Programmer.)
Select the COM port in the CPU Unit from the CX-Programmer and connect online.
For details, refer to Connecting Online from the CX-Programmer on page 34.
Note
More than one USB-Serial Conversion Cable can be used at a time, so a single
personal computer can be connected to several PLCs/PTs through two or more COM
ports.
When more than one Conversion Cable is being used, connect the second and later
Cables after the first Cable has been connected.
The communications driver is automatically installed for the second and later Cables,
so it is not necessary to install the driver a second time. Each Cable must have its own
unique COM port number. Allocate a different COM port to each Cable.
27
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