Mitsubishi Q/QnA Serial PLC Setup

Pay close attention to the compatibility matrix, configuration details, and limitations provided in this topic. The Mitsubishi CPU types each have specific communication nuances that must be considered.

The following information applies only to the Mitsubishi Q/QnA Serial PLC compatible with C-more Panels. This driver can be used to connect to the Serial Port on the CPU for the Q00 CPU and the Q01 CPU only. For other Q Series CPU, a Serial Communications Module can be used with this driver. Refer to Mitsubishi Q Series Compatibility Matrix to see what driver to use for the various CPU and Communications Modules in the Mitsubishi Q series.

The Serial Communications Modules supported for this driver are:

• QJ71C24
• QJ71C24-R2
• QJ71C24N
• QJ71C24N-R2
• QJ71C24N-R4

The C-more panel is the master by default.

Note: Remember to power cycle the PLC after making changes to the communication port settings.

View the PLC Serial Ports Settings

To Configure the Mitsubishi Q/QnA Serial PLC to communicate with the C-more Panel, you will first need to find the Port Settings for your Mitsubishi PLC. To do this, open the MELSOFT Software and double-click on the PLC Parameter icon on the left side panel of the MELSOFT Software as shown below.

When PLC Parameter is selected, the Q Parameter Setting window shown below will open.

Connect to the Q00 and Q01 CPU Serial Ports

To connect to the CPU Serial Ports of the Q00 CPU and the Q01 CPU, click on the Serial Tab so the Serial Communication is displayed as shown above. Set the following:

1. Use Serial Communication: Tick the box to select this option.
2. Transmission Speed: Click on the down arrow to display the Transmission speeds available and select the desired Speed. This is the same as the Baud Rate value setting of the C-more Programming Software's Panel Manager window. The Baud Rate and the Transmission Speed MUST MATCH.
3. Sum Check: Tick the box to select the Sum Check option.
4. Transmission Wait Time: Leave this setting on the default "No Waiting Time".
5. RUN Write Setting: Tick the Permit box the to turn this option ON.

You must remember to use STYLE4 for the Protocol setting in the C-more Protocol Manager window discussed below when connecting to the Q00 or Q01 CPU directly.

Using the QJ71C24 Module

To use the QJ71C24 module, from the Q Parameter Setting window shown above, select the I/O Assignment Tab. The I/O Assignment available options are shown below.

Note: The PLC will return an Error if you attempt Writes to the X or Y memory area that has been assigned to the communication module in the StartXY column

From this window, click on the Switch Setting button highlighted on the graphic above. This will open the Switch Setting window that will allow you to view the Serial Module parameters as shown below. This graphic includes call-outs that show what each value refers to.

1. The column labeled Switch 1 contains the Setting for Channel 1 Baud Rate and Transmission Settings. The High Byte highlighted in the graphic above with yellow, contains the Baud Rate and the Low Byte highlighted in the graphic above with green, contains the Transmission Settings. The charts below explain these Settings(fields in gray are invalid choices for C-more):

Baud Rate	High Byte value (Bits 15 to 8)
50	0x0F
300	0x00
600	0x01
1200	0x02
2400	0x03
4800	0x04
9600	0x05
14400	0x06
19200	0x07
28800	0x08
38400	0x09
57600	0x0A
115200	0x0B
230400	0x0C

Low Byte value
Setting	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
	Change Setting	Write During Run	Checksum Code	Stop Bit	Parity		Data Bit	Operation Setting
0	Disabled	Disabled	No	1 bit	00 = No Parity 10 = No Parity 01 = Odd Parity 11 = Even Parity		7 bits	Independent
1	Enabled	Enabled	Yes	2 bits			8 bits	Linked
	1	1	1	0	0	0	0	1

Looking at the Example graphic above before the tables, Switch 1 setting is 0x09E2. This would set the Channel 1 Seri0al Port on the module to 38400 Baud Rate, 1 Stop Bit, No Parity and 8 Data bits.

Where 0x09E2 breaks down as follows:

0x09 =	38400	(From the High Byte value Table Above)	0x09 =	38400
(From the Low Byte value Table Above)	(From the Low Byte value Table Above)	(From the Low Byte value Table Above)	(From the Low Byte value Table Above)	(From the Low Byte value Table Above)
0xE =	Bit 7	Bit 6	Bit 5	Bit 4
	1	1	1	0
	Change Setting = Enabled	Write During Run = Enabled	Checksum Code = Yes	Stop Bit = 1 Bit
	Note: Bits 5, 6 and 7 must be 1 for C-more Communications.
0x2 =	Bit 3	Bit 2	Bit 1	Bit 0
	0	0	1	0
	No Parity		Data Bit = 8 Bits	Operation Setting = Independent
	Note: Bit 0 must be 0 for C-more Communications.

2. These same charts also apply to the Channel 2 Serial Port using the settings in the Switch 3 field.

3. Switches 2 and 4 are for the Communications Protocol Settings of Channel 1 and Channel 2 respectively. Set this field to 0001 for STYLE1 or set to 0004 for STYLE4. These are the only two settings that will work with C-more. Refer to Mitsubishi documentation for the other available options and their meanings.

4. Switch 5 is the Station Number of the Module. It applies to both Serial Ports.

C-more Protocol Manager Settings

1. Do one of the following:

• Click the Protocol Manager button on the Home tab
  — or —
• Click the Protocol Manager button on the Setup tab
  — or —
• from the Navigation window, click the Function tab, click Setup and then select Protocol Manager.

2. From the Protocol Manager window, click the Device name on the tree to the left.

• The Device Setup window opens.