Introduction
All Maple Systems HMIs programmed with EBPro (EasyBuilder Pro), including every cMT X Series and cMT Series model, are compatible with Chong Hui Controlwell MD Series. Configure your Controller and HMI/cMT with the following parameters to establish reliable communication.
Supported Series: ControlWell MC3U-32T-A
HMI Setting
| Parameters | Recommended | Options | Notes |
|---|---|---|---|
| PLC type | CHONG HUI Controlwell MD Series | ||
| PLC I/F | RS232 | RS232/RS485/Ethernet | |
| Baud rate | 19200 | 9600 ~ 57600 | |
| Data bits | 8 | 7, 8 | |
| Parity | Even | Even, Odd, None | |
| Stop bits | 1 | 1, 2 | |
| PLC sta. no. | 1 | 1-255 | Must match PLC port setting. |
| Port no. | 5000 | Ethernet only. |
Device Address
| Bit/Word | Device type | Format | Range | Memo |
|---|---|---|---|---|
| B | M | DDDDD | 0 ~ 79999 | |
| B | X | OOOOo | 0 ~ 25707 | |
| B | Y | OOOOo | 0 ~ 25707 | |
| B | S | DDDD | 0 ~ 7999 | |
| B | SM | DDDD | 0 ~ 7999 | |
| B | T | DDDD | 0 ~ 7999 | |
| B | C | DDDD | 0 ~ 7999 | |
| B | HT | DD | 0 ~ 39 | |
| B | HC | DD | 0 ~ 39 | |
| B | D | DDDDD | 0 ~ 79999 | |
| B | AI | DDDD | 0 ~ 2199 | |
| W | AQ | DDDD | 0 ~ 2199 | |
| W | SD | DDDD | 0 ~ 4999 | |
| W | TD | DDDD | 0 ~ 7999 | |
| W | CD | DDDD | 0 ~ 7999 | |
| W | HTD | DD | 0 ~ 39 | |
| W | HCD | DD | 0 ~ 39 | |
| W | FD | DDDD | 0 ~ 9999 | |
| W | FDD | DDDD | 0 ~ 4999 |
Wiring Diagram
NOTE: The serial port pin assignments may vary between HMI models.
Diagram 1:
RS-232 (PLC COM1: RS-232 8P Mini-DIN)
The following is the view from the soldering point of a connector.

| HMI | Direction | PLC |
|---|---|---|
| Pin assignments | COM1 RS232 8P Mini-Din Male | |
| Rx | ↔ (bidirectional) | 5 TX |
| Tx | ↔ (bidirectional) | 4 RX |
| GND | ↔ (bidirectional) | 3/8 GND |
Diagram 2:
RS-485 2W (PLC COM3: RS-485 2W Terminal)
| HMI | Direction | PLC |
|---|---|---|
| Pin assignments | COM3 RS485 2W Terminal | |
| Data- | ↔ (bidirectional) | Data- |
| Data+ | ↔ (bidirectional) | Data+ |
| GND | ↔ (bidirectional) | GND |
Diagram 3:
Ethernet cable:

