Manuals > Device Connection Guide > Mitsubishi Electric > Public Protocol (Ethernet) > Q/L Series > Connection Example [Using Q Series Ethernet Unit]

overview

This is an example of a connection using the Q series and an Ethernet unit.

Model used

item	Model etc.
PLC	Q02CPU
Communication Unit	QJ71E71

Configuration environment

item	environment
OS	Windows7 Professional 64Bit
tool	GX-Developer Ver8.114U

Configuration details

item	setting	Setting items	Configuration Example
PLC side settings	Set with tools	IP address	192.168.0.100
PLC side settings	Set with tools	Port number	8192 (2000 hex)
PC settings	Unit Settings	IP address	192.168.0.1
		Port number	8193 (2001 hex)
		Communication Protocol	UDP (Binary code communication)
	Folder and communication test settings	Network Number	0
		PC Number	FF
		Request unit I/O number	3FF

* Most of the settings on the computer will be adjusted to match the settings on the unit.

When setting the port number in GX-Developer, set it in hexadecimal. You can also set the port number freely. The port number on the PC side and the PLC side can be the same.

PLC side settings

Set up "Q02CPU". Settings are done using GX-Developer etc.

1.Start GX-Developer and create a new project.

2.Open the menu "Online" - "Connection Destination" and confirm that you can communicate with PLC.

3.Double-click "Parameters" - "Network Parameters" in the tree, select "MELSECNET/Ethernet", and set as follows:
c_plc_0106

setting	Setting contents
Network Type	Ethernet
First I/O No.	0000
Network No.	1
Total number of (subsidiary) stations	Not set
Group No.	1
Area code	1
mode	online

Please set "First I/ONo." according to the position of "QJ71E71".

4.Click "Operation Settings" to display the Ethernet Operation Settings screen.
c_plc_0107

5.Set the following in the Ethernet operation settings screen
c_plc_0108

setting	Setting contents
Communication data code setting	Binary Code Communication
Initial timing setting	Always waiting for an OPEN (communication possible during STOP)
IP address	192.168.0.100
Allow writing during RUN	Check it
Send frame settings	Ethernet (V2.0)
TCP Liveness confirmation settings	Use KeepAlive

If you want to communicate using the ASCII protocol, select "ASCII code communication."

6.Click "Open Settings" to display the Open Settings screen.
c_plc_0109

7.Set the following from the open settings screen
c_plc_0110

setting	Setting contents
protocol	UDP
Open Method	Not set
Fixed Buffer	Reception
Fixed Buffer Update Procedure	With steps
Pairing Open	Do not pair
Survival confirmation	Do not confirm
Local station port number	2000
IP address of the communication partner	192.168.0.1
Port number of the communication partner	2001

Please note that when setting the port number in GX-Developer, it is set in hexadecimal.

If you want to allow connections from any IP address, set the "Partner IP address" to "255.255.255.255". This will result in a "broadcast" connection, allowing connections regardless of the destination IP address.

Please use this when you want to make a test connection.

c_plc_0111

8.Click "Finish setting" to close the network parameter dialog. After that, go to "Online" - "Write to PC" to write the parameters to the PLC.
c_plc_0112

After setting the parameters, you must turn off the power to the PLC once to reflect the settings. Although a remote reset may be possible from the tool, we recommend turning off the power once to ensure that the settings are reflected.

If you do not press the Finish Settings button, the settings will not be reflected, so be sure to press the Finish Settings button before writing.

PC settings

Use the Server application to connect to the PLC for which you have set up communications.

1.Right-click "Application" - "Driver" in the tree and select Add Driver.

2.Select the following units from the displayed driver list and add them:
If you want to communicate using the ASCII protocol, select the ASCII protocol.
c_plc_0113

3.Open the properties of the added unit (U01) and click Communication Settings.
c_plc_0114

4.Configure the following in "PC Settings"
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setting	Setting contents
Computer IP address	192.168.0.1
Computer port number	8193 (specified in decimal)

5.Set the following in "Unit side settings"
c_plc_0116

setting	Setting contents
Unit IP Address	192.168.0.100
Unit Port Number	8192 (specified in decimal)

6.Select "Ping Test" to check if the ping goes through normally.
If you see a message like "Ping test is success～", the test was successful.

7.Select the protocol in "Communication Details"
c_plc_0117

setting	Setting contents
protocol	UDP (recommended)

8.Perform a connection test to check the connection
c_plc_0118

If a message such as "Connection OK" is displayed, the connection is confirmed to be OK.

The CPU monitoring timer can be set in the "Other detailed settings" in the unit's communication settings dialog.

The CPU monitoring timer is the waiting time on the PLC side from receiving a command from the computer until returning a response to that command.

If you are referencing other PLC devices via MELSECNET or CC-Link, be sure to set an appropriate time (if you set the CPU monitoring timer to 0 and the other PLC goes into a state where its power is cut off, Ethernet communication itself will be disabled). For details, refer to the PLC manual.

For information on the network setting parameters when checking the connection, please refer to "About network setting parameters".

Connection example [Using Q Series Ethernet unit]

Connection example [Using Q Series Ethernet unit]