Introduction
All Maple Systems HMIs programmed with EBPro (EasyBuilder Pro), including every cMT X Series and cMT Series model, are compatible with a Rockwell/Allen-Bradley CompactLogix/FlexLogix Controller. Configure your Controller and HMI/cMT with the following parameters to establish reliable communication.
Supported Series: Rockwell/Allen-Bradley ControlLogix, CompactLogix, FlexLogix CH0 DF1
Website: rockwellautomation.com
HMI Settings
| Parameters | Recommended | Options | Notes |
|---|---|---|---|
| PLC type | Rockwell CompactLogix/FlexLogix | ||
| PLC I/F | RS232 | ||
| Baud rate | 19200 | 9600, 19200, 38400 | |
| Data bits | 8 | 8 | |
| Parity | None | Even, Odd, None | |
| Stop bits | 1 | 1 | |
| HMI sta. no. | 0 | ||
| PLC sta. no. | 1 | 1–31 |
PLC Settings
Communication mode:
Serial Port tab
- Mode: System
- Baud Rate: 19200
- Data Bits: 8
- Parity: None
- Stop Bits: 1 (default)
- Control Line: No Handshake
ControlLogix, CompactLogix CPU CH0 setting, System Protocol tab
- Protocol: DF1 Point to Point
- Error Check: BCC
- Station Address: 1
Create a Tag
The name format must be 4 characters. For example: B003, T004, C005, N007, and F008. Two or three characters are not available. For example: B03 or B3.
![RSLogix 5000 New Tag dialog with name B003 and Data Type INT[255], alongside the Select Data Type dialog with INT selected and Array Dimension 0 set to 255.](https://media.maplesystems.com/wp-content/uploads/2026/06/04-rslogix5000-new-tag-select-data-type.webp)
Device Address
| Bit/Word | Device type | Format | Range | Memo |
|---|---|---|---|---|
| B | B_BOOL | FFFDDDdd | 0 ~ 25525515 | Bit data file |
| B | N_BOOL | FFFDDDdd | 0 ~ 25525515 | Integer data file bit level (N7, 10 ~ 255) |
| DW | Tx.ACC | FFFDDD | 0 ~ 255255 | Timer Accumulator Value (T4, T10 ~ 255) |
| DW | Tx.PRE | FFFDDD | 0 ~ 255255 | Timer Preset Value (T4, T10 ~ 255) |
| DW | Nx_INT | FFFDDD | 0 ~ 255255 | Integer data file (N7, 10 ~ 255) |
| W | Bx_INT | FFFDDD | 0 ~ 255255 | Bit data file word level |
| DW | Cx.ACC | FFFDDD | 0 ~ 255255 | Counter Accumulator Value (C5, C10 ~ 255) |
| DW | Cx.PRE | FFFDDD | 0 ~ 255255 | Counter Preset Value (C5, C10 ~ 255) |
| W | F8_REAL | DDD | 0 ~ 255 | Floating point data file (F8) |
| W | Fx_REAL | FFFDDD | 0 ~ 255255 | Floating point data file (F008, F010 ~ F255) |
Wiring Diagram
NOTE: The serial port pin assignments may vary between HMI models.
RS-232
| HMI | Direction | PLC |
|---|---|---|
| Pin assignments | AB CPU CH0 RS232 9P D-Sub Female | |
| Rx | ↔ (bidirectional) | 3 TD |
| Tx | ↔ (bidirectional) | 2 RD |
| GND | ↔ (bidirectional) | 5 GND |