Manuals > Device Connection Guide > Mitsubishi Electric > Open Protocol (RS-232C) > Q/L/ iQ-R Series

overview

This is a setting example when connecting to the Q series via RS-232C.

Model used

item	Model etc.
PLC	Q02CPU
Communication Unit	QJ71C24-R2

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	Operational Settings	Independence
		Data bits	7bits
		Parity Bit	can be
		Odd/Even Parity	Even
		Stop bits	1bits
		Sum Check Code	can be
		Writing during RUN	permission
		Change settings	permission
		Communication speed	19200bps
		Communication Protocol	MC Protocol (Format 1)
		Station number setting	0
PC settings	Unit Settings	COMPort	Communication port number to connect to
		Transmission speed	19200bps
		Byte Size	7bits
		Stop bits	1bits
		parity	Even
		Sum Check	can be
		protocol	Format 1
	Folder and communication test settings	Area code	0
		Network Number	0
		PC Number	FF
		Request unit I/O number	3FF
		Request destination unit station number	0
		Your number	0

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

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 "Parameter" - "PC Parameter" in the tree to display the "Parameter Setting" dialog as shown below, and click "Read PC Data".
c_plc_0058

If necessary, set the format and leading XY.

c_plc_0059

4.Click "Switch Settings", configure the settings as follows, then click "Finish Settings" to close all dialog boxes.
c_plc_0060

For details on the switch settings, etc., please refer to the Mitsubishi Electric "Q Compatible Serial Communication Unit" User's Manual (Application Edition).

5.Click "Online" - "Write to PC" to write the parameters to the PLC.
c_plc_0061

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:
c_plc_0062

3.Open the properties of the added unit (U01) and click Communication Settings.
c_plc_0063

4.Set "Communication Settings" as follows:
c_plc_0064

setting	Setting contents
COMPort	Communication port number to connect to
Transmission speed	19200
Byte Size	7bits
Stop bits	1bits
parity	Even

5.Open "Other settings" and set it as follows:
c_plc_0065

setting	Setting contents
Sum Check	Check it
protocol	Format 1

6.USB-RS-If you are using a 232C conversion cable, the COM port may be locked in the event of a communication error, so check the reopen setting.
c_plc_0068

7.Perform a connection test to check the connection
c_plc_0067

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

Connection example [Q series]

Connection example [Q series]