Manuals > Device Connection Guide > Mitsubishi Electric > Public Protocol (Ethernet) > QnA Series

overview

This is a setting example for connecting to the QnA series via Ethernet.

Model used

item	Model etc.
PLC	Q2ACPU
Communication Unit	AJ71QE71

Configuration environment

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

Configuration details

item	setting	Setting items	Configuration Example
PLC side settings	Setting with switches and tools	IP address	192.168.0.100
		Port number	8192 (2000 hex)
		Communication data code setting	Binary Code Communication
PC settings	Unit Settings	IP address	192.168.0.1
		Port number	8193 (2001 hex)
		Communication Protocol	UDP
	Folder and communication test settings	Network Number	0
		PC Number	FF
		Request unit I/O number	03FF

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

You need to set the IP address and port number for the ladder from GX-Developer. In this case, 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 "AJ71QE71". Settings are made using the front switches and GX-Developer.

1.Set the switch as follows:

c_plc_0143

switch	explanation	Setting contents
MODE	mode ※Settings on the right are "Online"	0
SW1	TCP ULP Timeout error *The setting on the right is "Do not close"	OFF
SW2	Data Code Settings ※Settings on the right are "Binary"	OFF
SW3	Auto start mode setting ※Settings on the right side: "Follow Y19"	OFF
SW4	Not available	OFF
SW5	Not available	OFF
SW6	Not available	OFF
SW7	CPU Update timing settings ※The setting on the right is "Allow writing during RUN".	ON
SW8	Initial timing setting ※Select "Quick Start" in the settings on the right	OFF

*Since communication is carried out in binary code, set "SW2" to OFF.

2.Start GX-Developer and confirm that you can connect to PLC

3.Write the following ladder in GX-Developer
For "AJ71QE71", you need to initialize the IP address etc. with the ladder. Add the ladder below to the PLC.
This program is based on the program at the end of the "QnA Compatible Ethernet Interface Unit" manual published by Mitsubishi Electric.
c_plc_0144
※1 This is the IP address of PLC. Please set it in hexadecimal. Example) 192.168.0.100 → C0A80064
※4 PLC port number. Please set it in hexadecimal. Example) 8192 (decimal) → 2000 (hexadecimal)
※5 This is the IP address of the computer. Please set it in hexadecimal. Example) 192.168.0.1 → C0A80001
※6 This is the computer's port number. Please set it in hexadecimal. Example: 8193 (decimal) → 2001 (hexadecimal)
*2, *3, *7 In the above examples, when QE71 is assigned to slot 0, X/Y000 to X/Y01F will be automatically assigned.

Change the address depending on the slot position.

There are some points to note about the connection test.

Since the connection test uses a loopback test command, it cannot be tested against other QC24 stations via the data link system or network system.

4.Write the ladder to the PLC by selecting "Online" - "Write to PC", then reset and reflect the ladder.
c_plc_0145

Here, we write "POLY" because we set the ladder in the program "POLY". To reset, insert a key into the CPU and turn it to "RESET".

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:
c_plc_0146

3.Open the properties of the added unit (U01) and click Communication Settings.
c_plc_0147

4.Configure the following in "PC Settings"
c_plc_0115

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.

Connection example [QnA series]

Connection example [QnA series]