G3 Communication with Mitsubishi Q PLC over

TECHNICAL NOTE
TNOI24
Title: G3 Operator Interface communication with Mitsubishi Q
PLC over RS232
Product(s): G3 Operator Interfaces
Mitsubishi PLC QJ71C24-R2
This technical note presents how to connect a Red Lion G3 HMI with a Mitsubishi Q series PLC. The same
setup can be used to program a Modular Controller Enhanced Master.
Programming of the G3 is done using Crimson 2.0 software, build 230 or higher, while Mitsubishi GX device
software programs the Q series PLC.
SYSTEM SETUP:
The communication setup is as follow:
RS232 Cable
CH1: Transmission Channel
CH2: Reception Channel
G310
QJ71C24N-R2
Fig. 1: Communication Setup
CABLE INFORMATION:
RS232 Communication port information for the Mitsubishi QJ71C24N-R2 module:
Communication cable CBLMIT03 from Red Lion Controls can be used to connect a G3 (or Enhanced
Master or Data Station) RS232 port to the Mitsubishi QJ71C24N-R2 communication card.
The table below presents the communication cable pin out between the Enhanced master and the
QJ71C24N-R2 Communication card:
Information on the cable is available here: http://www.redlion.net/Support/Cable/CBLMIT03.pdf
G3 COMMUNICATION SETUP:
COMMUNICATION SETUP IN THE G3 MUST BE AS FOLLOWS:
ON THE RS232 COMMUNICATION PORT
Driver on RS232: Mitsubishi A/Q/FX Series PLC – MELSEC
Frame Validation: No
Baud Rate: 9600
Data Bits: 8 bits
Stop Bits: One
Parity: Odd
ON THE PLC BELOW THE RS232 COMMUNICATION PORT
Drop Number: 0
Melsec Control Format: Melsec1
Screen Shots Fig. 2 and Fig. 3 are from Crimson 2.0 in the communication Module.
Fig. 2 – RS232 communication port setup in Crimson 2.0 software.
Fig. 3 – PLC1 (i.e. Mitsubishi Q) communication setup in Crimson 2.0 software.
MITSUBISHI GX_DEV. SETTINGS
The screen shot Fig.4 shows the communication settings in Gx Developer environment. Fig.5 and 6
are part of Fig.4 showing the windows to access the QJ71C24-R2 settings. In this example, the
communication card is available in slot 9.
TO ACCESS THE SETTINGS,
Go in the “PLC Parameter” from the side menu,
Choose the “I/O Assignment” tab,
Check if the communication module is present in the slot you want,
Click on “Switch Setting” to setup the module.
Fig. 4 –GX. Developer environment with PLC parameter windows open.
SWITCH SETTING EXPLANATIONS IN GX. DEVELOPER
Switch 1 and 2 are configuring Com port 1 settings. Therefore, Switch 3 and 4 refer to Com port 2
settings. In this example, the switch settings are:
Switch 1 - 05C6
Switch 2 - 0001
Explanation for switch 1:
- 05 means 9600 baud rate.
- C6 is explained in the table below.
HEX
C
6
Binary
1
1
0
0
0
1
1
0
Bit Number
7
6
5
4
3
2
1
0
Bit 0 = Independent Control of the port
Bit 1 = 8 data bits
Bit 2 = yes to parity
Bit 3 = Odd parity
Bit 4 = 1 stop bit
Bit 5 = no checksum
Bit 6 = Write during run enabled
Bit 7 = Change setting enabled
Note: Frame Validation (Red Lion) and Checksum (Mitsubishi) are the same. Please set accordingly.
Fig. 5 – PLC parameter window showing I/O assignment.
Fig. 6 – Switch Setting window for I/O. Communication module in slot 9.